$BANR
BANNER CORP Stock $banr

$banr Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000094667320000004 Filed on February 21, 2020

Income Statement

Concept	2018 Q4	2017 Q4	2017 Q3
Revenue
YoY Change
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$6.100M	$5.900M	$5.300M
YoY Change	3.39%	-3.28%	8.16%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit	$21.02M	$27.68M	$18.08M
YoY Change	-24.07%	42.19%	-23.1%
Interest Expense	$11.28M	$5.211M	$5.068M
YoY Change	116.5%	35.84%	22.39%
% of Operating Profit	53.69%	18.83%	28.03%
Other Income/Expense, Net			$6.851M
YoY Change			-12.0%
Pretax Income	$40.58M	$41.44M	$35.96M
YoY Change	-2.07%	19.26%	-0.47%
Income Tax	$3.053M	$54.99M	$10.88M
% Of Pretax Income	7.52%	132.69%	30.26%
Net Earnings	$37.53M	-$13.55M	$25.08M
YoY Change	-377.0%	-159.41%	5.14%
Net Earnings / Revenue
Basic Earnings Per Share	$1.10	-$0.41	$0.76
Diluted Earnings Per Share	$1.09	-$0.41	$0.76
COMMON SHARES
Basic Shares Outstanding			32.98M shares
Diluted Shares Outstanding			33.08M shares

Balance Sheet

Concept	2018 Q4	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$272.2M	$261.2M	$241.8M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$171.8M	$154.8M	$159.9M
YoY Change	10.98%	-7.01%	-4.61%
Goodwill	$339.2M	$242.7M	$244.6M
YoY Change	39.77%	-0.79%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$75.00M	$71.00M	$119.0M
YoY Change	5.63%	-44.53%	-4.8%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$11.87B	$9.763B	$10.44B
YoY Change	21.59%	-0.31%	6.12%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$102.0M	$71.00M	$72.00M
YoY Change	43.66%	0.0%	-22.58%
Deferred Revenue
YoY Change
Short-Term Debt	$119.0M	$96.00M	$104.0M
YoY Change	23.96%	-9.43%	-4.59%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$102.0M	$71.00M	$72.00M
YoY Change	43.66%	0.0%	-22.58%
LONG-TERM LIABILITIES
Long-Term Debt	$114.0M	$99.00M	$97.00M
YoY Change	15.15%	4.21%	3.19%
Other Long-Term Liabilities	$41.00M	$41.00M	$41.00M
YoY Change	0.0%	0.0%	5.13%
Total Long-Term Liabilities	$155.0M	$140.0M	$138.0M
YoY Change	10.71%	2.94%	3.76%
TOTAL LIABILITIES
Total Short-Term Liabilities	$102.0M	$71.00M	$72.00M
Total Long-Term Liabilities	$155.0M	$140.0M	$138.0M
Total Liabilities	$10.39B	$8.491B	$9.116B
YoY Change	22.4%	0.03%	7.12%
SHAREHOLDERS EQUITY
Retained Earnings	$134.1M	$90.54M	$111.4M
YoY Change	48.07%	-5.03%	39.16%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.479B	$1.273B	$1.327B
YoY Change
Total Liabilities & Shareholders Equity	$11.87B	$9.763B	$10.44B
YoY Change	21.59%	-0.31%	6.12%

Cashflow Statement

Concept	2018 Q4	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$37.53M	-$13.55M	$25.08M
YoY Change	-377.0%	-159.41%	5.14%
Depreciation, Depletion And Amortization	$6.100M	$5.900M	$5.300M
YoY Change	3.39%	-3.28%	8.16%
Cash From Operating Activities	-$55.40M	$69.30M	$34.80M
YoY Change	-179.94%	-176.66%	18.77%
INVESTING ACTIVITIES
Capital Expenditures	-$10.10M	-$4.600M	-$2.200M
YoY Change	119.57%	-34.29%	-29.03%
Acquisitions
YoY Change
Other Investing Activities	-$183.9M	$459.1M	-$276.7M
YoY Change	-140.06%	229.58%	-415.87%
Cash From Investing Activities	-$194.0M	$454.5M	-$279.1M
YoY Change	-142.68%	243.8%	-430.3%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	273.0M	-504.3M	212.5M
YoY Change	-154.13%	1160.75%	-307.32%
NET CHANGE
Cash From Operating Activities	-55.40M	69.30M	34.80M
Cash From Investing Activities	-194.0M	454.5M	-279.1M
Cash From Financing Activities	273.0M	-504.3M	212.5M
Net Change In Cash	23.60M	19.50M	-31.80M
YoY Change	21.03%	983.33%	-381.42%
FREE CASH FLOW
Cash From Operating Activities	-$55.40M	$69.30M	$34.80M
Capital Expenditures	-$10.10M	-$4.600M	-$2.200M
Free Cash Flow	-$45.30M	$73.90M	$37.00M
YoY Change	-161.3%	-188.61%	14.2%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2019	banr	Other Than Temporary Impairment Losses Recoveries Investments Portion Recognized In Earnings Trading Securities OtherThanTemporaryImpairmentLossesRecoveriesInvestmentsPortionRecognizedInEarningsTradingSecurities	0	USD
CY2017Q4	banr	Trading Securities Number Of Securities In Nonaccrual Status TradingSecuritiesNumberOfSecuritiesInNonaccrualStatus	0	security
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
CY2017Q4	banr	Held To Maturity Securities Number Of Securities In Nonaccrual Status HeldToMaturitySecuritiesNumberOfSecuritiesInNonaccrualStatus	0	security
CY2018Q4	banr	Held To Maturity Securities Number Of Securities In Nonaccrual Status HeldToMaturitySecuritiesNumberOfSecuritiesInNonaccrualStatus	0	security
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	91-1691604
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019Q2	dei	Entity Public Float EntityPublicFloat	1874285015	USD
CY2019Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	234359000	USD
CY2018Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	231029000	USD
CY2018Q4	banr	Trading Securities Number Of Securities In Nonaccrual Status TradingSecuritiesNumberOfSecuritiesInNonaccrualStatus	0	security
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000946673
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Entity Small Business EntitySmallBusiness	false
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CY2019Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	199400000	USD
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CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	500000	shares
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CY2019	dei	Entity File Number EntityFileNumber	0-26584
CY2019	dei	Entity Registrant Name EntityRegistrantName	BANNER CORPORATION
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	10 South First Avenue
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Walla Walla
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	99362
CY2019	dei	City Area Code CityAreaCode	509
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CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4505000	USD
CY2017	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	4618000	USD
CY2019	us-gaap	Other Income OtherIncome	8632000	USD
CY2018	us-gaap	Other Income OtherIncome	7148000	USD
CY2017	us-gaap	Other Income OtherIncome	8985000	USD
CY2019	us-gaap	Other Operating Income OtherOperatingIncome	82124000	USD
CY2018	us-gaap	Other Operating Income OtherOperatingIncome	81070000	USD
CY2017	us-gaap	Other Operating Income OtherOperatingIncome	77935000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	33000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-837000	USD
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-2080000	USD
CY2019	us-gaap	Increase Decrease In Financial Instruments Used In Operating Activities IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities	-208000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	81949000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	84008000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	85200000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	226409000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	202613000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	192096000	USD
CY2019	banr	Capitalized Loan Origination Costs CapitalizedLoanOriginationCosts	28934000	USD
CY2018	banr	Capitalized Loan Origination Costs CapitalizedLoanOriginationCosts	17925000	USD
CY2019	banr	Amortization Of Core Deposit Intangible Assets AmortizationOfCoreDepositIntangibleAssets	8151000	USD
CY2018	banr	Amortization Of Core Deposit Intangible Assets AmortizationOfCoreDepositIntangibleAssets	6047000	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	5607000	USD
CY2017	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2017	banr	Amortization Of Core Deposit Intangible Assets AmortizationOfCoreDepositIntangibleAssets	6246000	USD
CY2019	us-gaap	Other Expenses OtherExpenses	28122000	USD
CY2018	us-gaap	Other Expenses OtherExpenses	26754000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	7544000	USD
CY2017	us-gaap	Other Expenses OtherExpenses	27142000	USD
CY2019	banr	Noninterest Operating Expense Before Acquisition Related Costs NoninterestOperatingExpenseBeforeAcquisitionRelatedCosts	350184000	USD
CY2018	banr	Noninterest Operating Expense Before Acquisition Related Costs NoninterestOperatingExpenseBeforeAcquisitionRelatedCosts	335764000	USD
CY2017	banr	Noninterest Operating Expense Before Acquisition Related Costs NoninterestOperatingExpenseBeforeAcquisitionRelatedCosts	318970000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	18823000	USD
CY2017	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	17245000	USD
CY2019	banr	Payment And Card Processing Expenses PaymentAndCardProcessingExpenses	16993000	USD
CY2018	banr	Payment And Card Processing Expenses PaymentAndCardProcessingExpenses	15412000	USD
CY2017	banr	Payment And Card Processing Expenses PaymentAndCardProcessingExpenses	14330000	USD
CY2019	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	9736000	USD
CY2018	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	17945000	USD
CY2017	us-gaap	Professional And Contract Services Expense ProfessionalAndContractServicesExpense	17534000	USD
CY2019	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	7836000	USD
CY2018	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	8346000	USD
CY2017	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	8637000	USD
CY2019	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2840000	USD
CY2018	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4446000	USD
CY2017	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	4689000	USD
CY2019	us-gaap	Taxes Other TaxesOther	3880000	USD
CY2018	us-gaap	Taxes Other TaxesOther	3284000	USD
CY2017	us-gaap	Taxes Other TaxesOther	2594000	USD
CY2019	us-gaap	Other Revenue Expense From Real Estate Operations OtherRevenueExpenseFromRealEstateOperations	-303000	USD
CY2018	us-gaap	Other Revenue Expense From Real Estate Operations OtherRevenueExpenseFromRealEstateOperations	-804000	USD
CY2017	us-gaap	Other Revenue Expense From Real Estate Operations OtherRevenueExpenseFromRealEstateOperations	2030000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	357728000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	341371000	USD
CY2017	us-gaap	Noninterest Expense NoninterestExpense	318970000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	183132000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	165110000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	151264000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36854000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28595000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	60776000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-786000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	66364000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	90488000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	146278000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	136515000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	60776000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.20
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.16
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.85
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.18
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.15
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.64
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.96
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.00
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	34868434	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32784724	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32888007	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34967684	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32894425	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32986707	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	146278000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	136515000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	60776000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	33843000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-6547000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3318000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	34000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-839000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-2109000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Before Tax After Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionBeforeTaxAfterReclassificationAdjustment	601000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Before Tax After Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionBeforeTaxAfterReclassificationAdjustment	-15384000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Before Tax After Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionBeforeTaxAfterReclassificationAdjustment	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	8258000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-5028000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-423000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	26152000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-16064000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-786000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	172430000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	120451000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	59990000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	1305710000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	34401000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	5001000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	31045000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	4335000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1272626000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1272626000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	136515000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-16064000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	64791000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-56267000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	607000	USD
CY2019	banr	Amortization Of Core Deposit Intangible Assets AmortizationOfCoreDepositIntangibleAssets	8151000	USD
CY2018	banr	Amortization Of Core Deposit Intangible Assets AmortizationOfCoreDepositIntangibleAssets	6047000	USD
CY2017	banr	Amortization Of Core Deposit Intangible Assets AmortizationOfCoreDepositIntangibleAssets	6246000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	33000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-837000	USD
CY2018Q4	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	179709000	USD
CY2018Q4	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	179709000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1478595000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1478595000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	146278000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	26152000	USD
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	93495000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	53922000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition	5226000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	85200000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	85200000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1594034000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	146278000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	136515000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	60776000	USD
CY2019	us-gaap	Depreciation Depreciation	17282000	USD
CY2018	us-gaap	Depreciation Depreciation	15232000	USD
CY2017	us-gaap	Depreciation Depreciation	14701000	USD
CY2019	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	-881000	USD
CY2018	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	-6571000	USD
CY2017	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	1972000	USD
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-2080000	USD
CY2019	us-gaap	Increase Decrease In Other Financial Instruments Used In Operating Activities IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities	-208000	USD
CY2018	us-gaap	Increase Decrease In Other Financial Instruments Used In Operating Activities IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities	3775000	USD
CY2017	us-gaap	Increase Decrease In Other Financial Instruments Used In Operating Activities IncreaseDecreaseInOtherFinancialInstrumentsUsedInOperatingActivities	-2844000	USD
CY2019	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	0	USD
CY2018	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	0	USD
CY2017	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	1258000	USD
CY2019	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	0	USD
CY2018	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	100000	USD
CY2017	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	1849000	USD
CY2019	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	0	USD
CY2018	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	0	USD
CY2017	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	12189000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-15548000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	3498000	USD
CY2017	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	807137000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1070814000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	781879000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1027989000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	3938000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-2965000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	6554000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	5965000	USD
CY2019	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	4246000	USD
CY2018	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	4471000	USD
CY2017	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	4057000	USD
CY2019	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	15993000	USD
CY2018	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	15066000	USD
CY2017	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	15225000	USD
CY2019	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-1075000	USD
CY2018	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	833000	USD
CY2017	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	4295000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10000000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8500000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8000000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	0	USD
CY2018	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	387000	USD
CY2017	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	256000	USD
CY2019	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	1094237000	USD
CY2018	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	896461000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	18429000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	15861000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2546000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	5588000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	17322000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-179000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	148874000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	30775000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	346702000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	277503000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	913951000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	838247000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	321510000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	173454000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	187080000	USD
CY2019	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	450000000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	503814000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7815000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	7768000	USD
CY2017	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	222334000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	86083000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	214609000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	522564000	USD
CY2019	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	54850000	USD
CY2018	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	9612000	USD
CY2017	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	6490000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	50962000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	33152000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	11817000	USD
CY2019	banr	Loans Originated Netof Principal Collections LoansOriginatedNetofPrincipalCollections	-304191000	USD
CY2018	banr	Loans Originated Netof Principal Collections LoansOriginatedNetofPrincipalCollections	-416218000	USD
CY2017	banr	Loans Originated Netof Principal Collections LoansOriginatedNetofPrincipalCollections	-288951000	USD
CY2019	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	9798000	USD
CY2018	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	33680000	USD
CY2017	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	126508000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	27560000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	9853000	USD
CY2017	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	21923000	USD
CY2019	banr	Netcashpaidrelatedtobranchdivestiture Netcashpaidrelatedtobranchdivestiture	-26944000	USD
CY2018	banr	Netcashpaidrelatedtobranchdivestiture Netcashpaidrelatedtobranchdivestiture	1574000	USD
CY2017	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	113222000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	24700000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	23094000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12244000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	20121000	USD
CY2019	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	175998000	USD
CY2018	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	143175000	USD
CY2017	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	118304000	USD
CY2019	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	170380000	USD
CY2018	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	163683000	USD
CY2017	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	116132000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1436000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-3583000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-254000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-143114000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-976218000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-393287000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	272625000	USD
CY2019	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	35539000	USD
CY2018	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	10996000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	29779000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	956439000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	60066000	USD
CY2017	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	10000	USD
CY2018	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	0	USD
CY2017	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	0	USD
CY2019	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	280415000	USD
CY2018	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	10000	USD
CY2017	us-gaap	Payments For Federal Home Loan Bank Advances PaymentsForFederalHomeLoanBankAdvances	9000	USD
CY2019	banr	Proceedsfrom Repaymentsof Federal Home Loan Bank Borrowings ProceedsfromRepaymentsofFederalHomeLoanBankBorrowings	-300000000	USD
CY2018	banr	Proceedsfrom Repaymentsof Federal Home Loan Bank Borrowings ProceedsfromRepaymentsofFederalHomeLoanBankBorrowings	540000000	USD
CY2017	banr	Proceedsfrom Repaymentsof Federal Home Loan Bank Borrowings ProceedsfromRepaymentsofFederalHomeLoanBankBorrowings	-54000000	USD
CY2019	us-gaap	Increase Decrease In Other Loans IncreaseDecreaseInOtherLoans	520000	USD
CY2018	us-gaap	Increase Decrease In Other Loans IncreaseDecreaseInOtherLoans	-7870000	USD
CY2017	us-gaap	Increase Decrease In Other Loans IncreaseDecreaseInOtherLoans	9825000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	56074000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	59280000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	65759000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	53922000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	34401000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	31045000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1915000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1554000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1630000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	13481000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	272196000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	261200000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	247719000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	307735000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	272196000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	261200000	USD
CY2019	us-gaap	Interest Paid InterestPaid	58239000	USD
CY2018	us-gaap	Interest Paid InterestPaid	28098000	USD
CY2017	us-gaap	Interest Paid InterestPaid	18875000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	27329000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21664000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35500000	USD
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	303000	USD
CY2018	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1645000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	51199000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	13778000	USD
CY2016Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	8226000	USD
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	426609000	USD
CY2018	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	915821000	USD
CY2017	banr	Assets Disposed AssetsDisposed	-259398000	USD
CY2019	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	373016000	USD
CY2018	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	832278000	USD
CY2017	banr	Liabilities Transfered LiabilitiesTransfered	-160465000	USD
CY2019Q4	banr	Number Of Wholly Owned Subsidiaries NumberOfWhollyOwnedSubsidiaries	2	subsidiary
CY2019Q4	banr	Number Of Wholly Owned Grantor Trusts NumberOfWhollyOwnedGrantorTrusts	10	subsidiary
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-style:italic;font-weight:bold;">Use of Estimates:</span><span style="font-family:inherit;font-size:9pt;"> In the opinion of management, the accompanying consolidated statements of financial condition and related consolidated statements of operations, comprehensive income, changes in shareholders’ equity and cash flows reflect all adjustments (which include reclassification and normal recurring adjustments) that are necessary for a fair presentation in conformity with GAAP. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect amounts reported in the consolidated financial statements. Various elements of the Company’s accounting policies, by their nature, are inherently subject to estimation techniques, valuation assumptions and other subjective assessments. In particular, management has identified several accounting policies that, due to the judgments, estimates and assumptions inherent in those policies, are critical to an understanding of Banner’s consolidated financial statements. These policies relate to (i) the methodology for the recognition of interest income, (ii) determination of the provision and allowance for loan and lease losses, (iii) the valuation of financial assets and liabilities measured at fair value, including other-than-temporary impairment (OTTI) losses, (iv) the valuation of intangible assets, such as goodwill,</span><span style="font-family:inherit;font-size:9pt;color:#ff0000;"> </span><span style="font-family:inherit;font-size:9pt;">core deposit intangibles (CDI) and mortgage servicing rights, (v) the valuation of real estate held for sale, (vi) the valuation or recognition of deferred tax assets and liabilities and (vii) the valuation of assets and liabilities acquired in business combinations and subsequent recognition of related income and expense. These policies and judgments, estimates and assumptions are described in greater detail in subsequent Notes to the Consolidated Financial Statements. Management believes that the judgments, estimates and assumptions used in the preparation of the consolidated financial statements are appropriate based on the factual circumstances at the time. However, given the sensitivity of the consolidated financial statements to these critical accounting policies, the use of other judgments, estimates and assumptions could result in material differences in the Company’s results of operations or financial condition. Further, subsequent changes in economic or market conditions could have a material impact on these estimates and the Company’s financial condition and operating results in future periods.</span></div><div style="line-height:120%;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;"><br/></span></div>
CY2019Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	25858000	USD
CY2019Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	4247000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	28300000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	32000000.0	USD
CY2019Q4	banr	Federal Home Loan Bank Stock Par Value Per Share FederalHomeLoanBankStockParValuePerShare	100
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1551557000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	236094000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	4658000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	2947000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2612000	USD
CY2019Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1529946000	USD
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;font-style:italic;font-weight:bold;">Reclassification:</span><span style="font-family:inherit;font-size:9pt;"> Certain reclassifications have been made to the prior years’ consolidated financial statements and/or schedules to conform to the current year’s presentation. These reclassifications may have affected certain reported amounts and ratios for the prior periods. These reclassifications had no effect on retained earnings or net income as previously presented and the effect of these reclassifications is considered immaterial.</span></div>
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	237805000	USD
CY2018Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	1648421000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	7171000	USD
CY2018Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	19369000	USD
CY2018Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	1636223000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Amortized Cost Before Other Than Temporary Impairment HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment	234220000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	1807000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	3490000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	232537000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	307299000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2872000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	100822000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1375000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	408121000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	4247000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	55722000	USD
CY2017	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	1300000	USD
CY2019Q4	banr	Trading Securities Number Of Securities In Nonaccrual Status TradingSecuritiesNumberOfSecuritiesInNonaccrualStatus	0	security
CY2019	us-gaap	Trading Securities Unrealized Holding Loss TradingSecuritiesUnrealizedHoldingLoss	208000	USD
CY2017	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	28000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	19506000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	335000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	75228000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	2947000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	412162000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4313000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	659936000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	15056000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1072098000	USD
CY2018Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	19369000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	40804000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	495000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	75159000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2995000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	115963000	USD
CY2018Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	3490000	USD
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	90	security
CY2018Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	271	security
CY2019Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	17	security
CY2018Q4	us-gaap	Held To Maturity Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions	90	security
CY2019	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	0	USD
CY2018	us-gaap	Trading Securities Unrealized Holding Gain TradingSecuritiesUnrealizedHoldingGain	3800000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	66300000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	46000	USD
CY2019	banr	Debt Securities Available For Sale Realized Gain Loss Partial Calls DebtSecuritiesAvailableForSaleRealizedGainLossPartialCalls	-12000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	214600000	USD
CY2018	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	-839000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	522600000	USD
CY2017	us-gaap	Available For Sale Securities Gross Realized Gain Loss Net AvailableForSaleSecuritiesGrossRealizedGainLossNet	-2100000	USD
CY2019Q4	banr	Availableforsale Securities Numberof Securitiesin Nonaccrual Status AvailableforsaleSecuritiesNumberofSecuritiesinNonaccrualStatus	0	security
CY2019	us-gaap	Proceeds From Sale Of Held To Maturity Securities ProceedsFromSaleOfHeldToMaturitySecurities	0	USD
CY2019	us-gaap	Heldtomaturity Securities Sold Security Realized Gain Loss Excluding Other Than Temporary Impairments HeldtomaturitySecuritiesSoldSecurityRealizedGainLossExcludingOtherThanTemporaryImpairments	-1000	USD
CY2018	us-gaap	Heldtomaturity Securities Sold Security Realized Gain Loss Excluding Other Than Temporary Impairments HeldtomaturitySecuritiesSoldSecurityRealizedGainLossExcludingOtherThanTemporaryImpairments	2000000	USD
CY2019Q4	banr	Held To Maturity Securities Number Of Securities In Nonaccrual Status HeldToMaturitySecuritiesNumberOfSecuritiesInNonaccrualStatus	0	security
CY2019Q4	banr	Trading Securities Debt Maturities Year Six Through Ten Fair Value TradingSecuritiesDebtMaturitiesYearSixThroughTenFairValue	0	USD
CY2019Q4	banr	Trading Securities Debt Maturities Next Twelve Months Amortized Cost Basis TradingSecuritiesDebtMaturitiesNextTwelveMonthsAmortizedCostBasis	0	USD
CY2019Q4	banr	Trading Securities Debt Maturities Next Twelve Months Fair Value TradingSecuritiesDebtMaturitiesNextTwelveMonthsFairValue	0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	1630000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	1630000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount	810000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	811000	USD
CY2019Q4	banr	Trading Securities Debt Maturities Year Two Through Five Amortized Cost Basis TradingSecuritiesDebtMaturitiesYearTwoThroughFiveAmortizedCostBasis	0	USD
CY2019Q4	banr	Trading Securities Debt Maturities Year Two Through Five Fair Value TradingSecuritiesDebtMaturitiesYearTwoThroughFiveFairValue	0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	48703000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	49614000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount	61664000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	62582000	USD
CY2019Q4	banr	Trading Securities Debt Maturities Year Six Through Ten Amortized Cost Basis TradingSecuritiesDebtMaturitiesYearSixThroughTenAmortizedCostBasis	0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	358305000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	368950000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	42872000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	44372000	USD
CY2019Q4	banr	Trading Securities Debt Maturities Year Eleven Through Twenty Amortized Cost Basis TradingSecuritiesDebtMaturitiesYearElevenThroughTwentyAmortizedCostBasis	27203000	USD
CY2019Q4	banr	Trading Securities Debt Maturities Year Eleven Through Twenty Fair Value TradingSecuritiesDebtMaturitiesYearElevenThroughTwentyFairValue	25636000	USD
CY2019Q4	banr	Available For Sale Securities Debt Maturities Year Eleven Through Twenty Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesYearElevenThroughTwentyAmortizedCostBasis	243275000	USD
CY2019Q4	banr	Available For Sale Securities Debt Maturities Year Eleven Through Twenty Fair Value AvailableForSaleSecuritiesDebtMaturitiesYearElevenThroughTwentyFairValue	247506000	USD
CY2019Q4	banr	Held To Maturity Securities Debt Maturities After Eleven Through Twenty Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterElevenThroughTwentyYearsNetCarryingAmount	103066000	USD
CY2019Q4	banr	Held To Maturity Securities Debt Maturities Year Eleven Through Twenty Fair Value HeldToMaturitySecuritiesDebtMaturitiesYearElevenThroughTwentyFairValue	102540000	USD
CY2019Q4	banr	Trading Securities Debt Maturities After Twenty Years Amortized Cost Basis TradingSecuritiesDebtMaturitiesAfterTwentyYearsAmortizedCostBasis	0	USD
CY2019Q4	banr	Trading Securities Debt Maturities After Twenty Years Fair Value TradingSecuritiesDebtMaturitiesAfterTwentyYearsFairValue	0	USD
CY2019Q4	banr	Available For Sale Securities Debt Maturities After Twenty Years Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesAfterTwentyYearsAmortizedCostBasis	878033000	USD
CY2019Q4	banr	Available For Sale Securities Debt Maturities After Twenty Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTwentyYearsFairValue	883857000	USD
CY2019Q4	banr	Held To Maturity Securities Debt Maturities After Twenty Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterTwentyYearsNetCarryingAmount	27682000	USD
CY2019Q4	banr	Held To Maturity Securities Debt Maturities After Twenty Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTwentyYearsFairValue	27500000	USD
CY2019Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	27203000	USD
CY2019Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	25636000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Interestbearing Depositsfor Other Debt Facilities Amortized Cost PledgedFinancialInstrumentsNotSeparatelyReportedInterestbearingDepositsforOtherDebtFacilitiesAmortizedCost	2683000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1529946000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1551557000	USD
CY2019Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	236094000	USD
CY2019Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	237805000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securitiesfor Stateand Local Government Public Deposits PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesforStateandLocalGovernmentPublicDeposits	146220000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securitiesfor Stateand Local Government Public Deposits Amortized Cost PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesforStateandLocalGovernmentPublicDepositsAmortizedCost	145407000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securitiesfor Stateand Local Government Public Deposits Fair Value PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesforStateandLocalGovernmentPublicDepositsFairValue	149552000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securitiesfor Interest Rate Swap Counterparties PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesforInterestRateSwapCounterparties	17301000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securities For Interest Rate Swap Counterparties Amortized Cost PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForInterestRateSwapCounterpartiesAmortizedCost	17006000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securities For Interest Rate Swap Counterparties Fair Value PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForInterestRateSwapCounterpartiesFairValue	17480000	USD
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities For Repurchase Agreements PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements	135523000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securities For Repurchase Agreements Amortized Cost PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreementsAmortizedCost	134233000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securities For Repurchase Agreements Fair Value PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreementsFairValue	135523000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Interestbearing Depositsfor Other Debt Facilities PledgedFinancialInstrumentsNotSeparatelyReportedInterestbearingDepositsforOtherDebtFacilities	2683000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Interestbearing Depositsfor Other Debt Facilities Fair Value PledgedFinancialInstrumentsNotSeparatelyReportedInterestbearingDepositsforOtherDebtFacilitiesFairValue	2671000	USD
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities Pledged PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged	301727000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securities Amortized Cost PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesAmortizedCost	299329000	USD
CY2019Q4	banr	Pledged Financial Instruments Not Separately Reported Securities Fair Value PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesFairValue	305226000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	9305357000	USD
CY2019Q4	banr	Loans Receivable Loan Percentage Of Total LoansReceivableLoanPercentageOfTotal	1.000
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	8684595000	USD
CY2018Q4	banr	Loans Receivable Loan Percentage Of Total LoansReceivableLoanPercentageOfTotal	1.000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	100559000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	96485000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	9204798000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	8588110000	USD
CY2019Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	438000	USD
CY2018Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-1400000	USD
CY2019Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	25000000.0	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	21780000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	58000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	510000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	7509000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Disposals Of Loans CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans	0	USD
CY2018Q4	us-gaap	Receivable With Imputed Interest Discount ReceivableWithImputedInterestDiscount	25700000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	3300000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	3500000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	23500000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Outstanding Balance CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance	22000000.0	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	15900000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	14400000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	5216000	USD
CY2017Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	6520000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	683000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Additions CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions	995000	USD
CY2019	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion	1891000	USD
CY2018	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Reclassifications From Nonaccretable Difference CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsFromNonaccretableDifference	5152000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	4518000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield	5216000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Nonaccretable Difference CertainLoansAcquiredInTransferNonaccretableDifference	7400000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Nonaccretable Difference CertainLoansAcquiredInTransferNonaccretableDifference	7100000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	49605000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	24284000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	4374000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	37501000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	31813000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	17765000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	11311000	USD
CY2018Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	416000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	29262000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	550000	USD
CY2018	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	32033000	USD
CY2018	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	787000	USD
CY2017	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	39263000	USD
CY2017	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	898000	USD
CY2019Q4	banr	Financing Receivable Modifications Accrual Status FinancingReceivableModificationsAccrualStatus	6466000	USD
CY2019Q4	banr	Financing Receivable Modifications Nonaccrual Status FinancingReceivableModificationsNonaccrualStatus	1496000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	7962000	USD
CY2018Q4	banr	Financing Receivable Modifications Accrual Status FinancingReceivableModificationsAccrualStatus	13422000	USD
CY2018Q4	banr	Financing Receivable Modifications Nonaccrual Status FinancingReceivableModificationsNonaccrualStatus	317000	USD
CY2018Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	13739000	USD
CY2019Q4	banr	Financing Receivable Modifications Commitments To Advance Funds FinancingReceivableModificationsCommitmentsToAdvanceFunds	0	USD
CY2018	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	contract
CY2019	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	3	contract
CY2019	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1846000	USD
CY2019	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1846000	USD
CY2017	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	contract
CY2017	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	contract
CY2017	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3714000	USD
CY2017	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3714000	USD
CY2019	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	9305357000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	8684595000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	35562000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	15938000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	9253857000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	9305357000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	2097000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	4088000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	5131000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	9257015000	USD
CY2019Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	15938000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	9305357000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	38202000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	14413000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	8631980000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	8684595000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	906000	USD
CY2018Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	14748000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	96485000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	10000000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2465000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	8391000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	100559000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4374000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	96107000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	100559000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	32404000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	89028000	USD
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8500000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	96485000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	416000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	95986000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Allowance For Loan Losses CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAllowanceForLoanLosses	83000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	96485000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	20075000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	8650107000	USD
CY2018Q4	us-gaap	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Carrying Amount Net CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet	14413000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	8684595000	USD
CY2016Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	85997000	USD
CY2017	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8000000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	3731000	USD
CY2017	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	8700000	USD
CY2017Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	89028000	USD
CY2018Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2611000	USD
CY2017Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	360000	USD
CY2016Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	11081000	USD
CY2019	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	109000	USD
CY2018	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	641000	USD
CY2017	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	46000	USD
CY2019	banr	Real Estate Owned Acquisitions Through Capitalized Costs RealEstateOwnedAcquisitionsThroughCapitalizedCosts	0	USD
CY2018	banr	Real Estate Owned Acquisitions Through Capitalized Costs RealEstateOwnedAcquisitionsThroughCapitalizedCosts	0	USD
CY2017	banr	Real Estate Owned Acquisitions Through Capitalized Costs RealEstateOwnedAcquisitionsThroughCapitalizedCosts	54000	USD
CY2019	banr	Real Estate Owned Additionsfrom Acquisitions RealEstateOwnedAdditionsfromAcquisitions	650000	USD
CY2018	banr	Real Estate Owned Additionsfrom Acquisitions RealEstateOwnedAdditionsfromAcquisitions	2593000	USD
CY2017	banr	Real Estate Owned Additionsfrom Acquisitions RealEstateOwnedAdditionsfromAcquisitions	0	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	2588000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	838000	USD
CY2017	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	13474000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-32000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-242000	USD
CY2017	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-2909000	USD
CY2019	us-gaap	Real Estate Owned Valuation Allowance Period Increase Decrease RealEstateOwnedValuationAllowancePeriodIncreaseDecrease	0	USD
CY2018	us-gaap	Real Estate Owned Valuation Allowance Period Increase Decrease RealEstateOwnedValuationAllowancePeriodIncreaseDecrease	-387000	USD
CY2017	us-gaap	Real Estate Owned Valuation Allowance Period Increase Decrease RealEstateOwnedValuationAllowancePeriodIncreaseDecrease	-256000	USD
CY2018Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2611000	USD
CY2017Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	360000	USD
CY2019Q4	banr	Real Estate Acquired Through Foreclosure Residential RealEstateAcquiredThroughForeclosureResidential	48000	USD
CY2018Q4	banr	Real Estate Acquired Through Foreclosure Residential RealEstateAcquiredThroughForeclosureResidential	0	USD
CY2019Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	1500000	USD
CY2018Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	1200000	USD
CY2019Q4	us-gaap	Land Land	34841000	USD
CY2018Q4	us-gaap	Land Land	37835000	USD
CY2019Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	169272000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	163813000	USD
CY2019Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	123851000	USD
CY2018Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	122614000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	327964000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	324262000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	149956000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	152453000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	178008000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	171809000	USD
CY2019Q4	us-gaap	Real Estate Held For Development And Sale RealEstateHeldForDevelopmentAndSale	1500000	USD
CY2018Q4	us-gaap	Real Estate Held For Development And Sale RealEstateHeldForDevelopmentAndSale	557000	USD
CY2019	us-gaap	Depreciation Depreciation	17300000	USD
CY2018	us-gaap	Depreciation Depreciation	15200000	USD
CY2017	us-gaap	Depreciation Depreciation	14700000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	17300000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	17200000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	16400000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	3945000000	USD
CY2018Q4	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	3657817000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	1280003000	USD
CY2018Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	1191016000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	1934041000	USD
CY2018Q4	us-gaap	Interest Bearing Domestic Deposit Savings InterestBearingDomesticDepositSavings	1842581000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1769194000	USD
CY2018Q4	us-gaap	Interest Bearing Domestic Deposit Money Market InterestBearingDomesticDepositMoneyMarket	1465369000	USD
CY2019Q4	banr	Deposits Domestic Transaction And Saving Accounts DepositsDomesticTransactionAndSavingAccounts	4983238000	USD
CY2018Q4	banr	Deposits Domestic Transaction And Saving Accounts DepositsDomesticTransactionAndSavingAccounts	4498966000	USD
CY2019Q4	banr	Time Deposits250000orless TimeDeposits250000orless	936940000	USD
CY2018Q4	banr	Time Deposits250000orless TimeDeposits250000orless	1143303000	USD
CY2019Q4	banr	Time Deposits Morethan250000 TimeDepositsMorethan250000	183463000	USD
CY2018Q4	banr	Time Deposits Morethan250000 TimeDepositsMorethan250000	176962000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	1120403000	USD
CY2018Q4	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	1320265000	USD
CY2019Q4	us-gaap	Deposits Domestic DepositsDomestic	10048641000	USD
CY2018Q4	us-gaap	Deposits Domestic DepositsDomestic	9477048000	USD
CY2019Q4	banr	Deposits Domestic Public Fund Transaction DepositsDomesticPublicFundTransaction	244418000	USD
CY2018Q4	banr	Deposits Domestic Public Fund Transaction DepositsDomesticPublicFundTransaction	217401000	USD
CY2019Q4	banr	Interest Bearing Domestic Deposit Public Fund Certificates InterestBearingDomesticDepositPublicFundCertificates	35184000	USD
CY2018Q4	banr	Interest Bearing Domestic Deposit Public Fund Certificates InterestBearingDomesticDepositPublicFundCertificates	30089000	USD
CY2019Q4	banr	Deposits Domestic Public Deposits DepositsDomesticPublicDeposits	279602000	USD
CY2018Q4	banr	Deposits Domestic Public Deposits DepositsDomesticPublicDeposits	247490000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	202884000	USD
CY2018Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	377347000	USD
CY2019Q4	banr	Business Combination Acquired Deposits Time Deposit Premium BusinessCombinationAcquiredDepositsTimeDepositPremium	269000	USD
CY2018Q4	banr	Business Combination Acquired Deposits Time Deposit Premium BusinessCombinationAcquiredDepositsTimeDepositPremium	563000	USD
CY2019Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	7900000	USD
CY2018Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	8300000	USD
CY2019Q4	banr	Timedepositsequaltoorgreaterthan250000 Timedepositsequaltoorgreaterthan250000	189000000.0	USD
CY2018Q4	banr	Timedepositsequaltoorgreaterthan250000 Timedepositsequaltoorgreaterthan250000	180500000	USD
CY2019Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	846941000	USD
CY2019Q4	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year One TimeDepositsWeightedAverageInterestRateMaturitiesYearOne	0.0128
CY2019Q4	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Five TimeDepositsWeightedAverageInterestRateMaturitiesYearFive	0.0223
CY2019Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	2248000	USD
CY2019Q4	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Greater Than Five Years TimeDepositsWeightedAverageInterestRateMaturitiesGreaterThanFiveYears	0.0118
CY2019Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	167857000	USD
CY2019Q4	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Two TimeDepositsWeightedAverageInterestRateMaturitiesYearTwo	0.0177
CY2019Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	79422000	USD
CY2019Q4	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Three TimeDepositsWeightedAverageInterestRateMaturitiesYearThree	0.0197
CY2019Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	11374000	USD
CY2019Q4	us-gaap	Time Deposits Weighted Average Interest Rate Maturities Year Four TimeDepositsWeightedAverageInterestRateMaturitiesYearFour	0.0175
CY2019Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	12561000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	1120403000	USD
CY2019Q4	us-gaap	Weighted Average Rate Domestic Deposit Time Deposits WeightedAverageRateDomesticDepositTimeDeposits	0.0143
CY2019Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	300000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0184
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	540000000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0264
CY2019Q4	banr	Federal Home Loan Bank Advances Maturities Summary Due After One Year Through Three Years FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterOneYearThroughThreeYears	150000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0.0258
CY2018Q4	banr	Federal Home Loan Bank Advances Maturities Summary Due After One Year Through Three Years FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterOneYearThroughThreeYears	0	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Two To Three Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateTwoToThreeYearsFromBalanceSheetDate	0
CY2019Q4	banr	Federal Home Loan Bank Advances Maturities Summary Due After Three Years Through Five Years FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterThreeYearsThroughFiveYears	0	USD
CY2019Q4	banr	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Threeto Five Yearsfrom Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreetoFiveYearsfromBalanceSheetDate	0
CY2018Q4	banr	Federal Home Loan Bank Advances Maturities Summary Due After Three Years Through Five Years FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterThreeYearsThroughFiveYears	0	USD
CY2018Q4	banr	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Threeto Five Yearsfrom Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateThreetoFiveYearsfromBalanceSheetDate	0
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	0	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	189000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate After Five Years From Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterFiveYearsFromBalanceSheetDate	0.0594
CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	450000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Interest Rate FederalHomeLoanBankAdvancesInterestRate	0.0209
CY2018Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	540189000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2494000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4130000	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Interest Rate FederalHomeLoanBankAdvancesInterestRate	0.0264
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Maximum Outstanding At Any Month End FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd	666000000.0	USD
CY2018Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Maximum Outstanding At Any Month End FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd	540200000	USD
CY2019	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Balance Of Agreements Outstanding FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding	477800000	USD
CY2018	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Balance Of Agreements Outstanding FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding	253700000	USD
CY2019	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate For Year FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear	0.0256
CY2018	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate For Year FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear	0.0222
CY2019Q4	us-gaap	Pledged Financial Instruments Not Separately Reported Securities For Repurchase Agreements PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements	135500000	USD
CY2019Q4	banr	Number Of Wholly Owned Grantor Trusts NumberOfWhollyOwnedGrantorTrusts	10	subsidiary
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	25278000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	21869000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	30961000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3085000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	27772000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	25999000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.020
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.023
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.020
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2021000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	58646000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1344000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	575000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2204000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34046000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7738000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9082000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2596000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	56442000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	36854000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	28595000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	90488000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.022
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.020
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0.026
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0.005
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0.006
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Life Insurance EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance	0.011
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.012
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.008
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.006
CY2019	banr	Changeineffectiveincometaxrateduetomergerandacquisitioncosts Changeineffectiveincometaxrateduetomergerandacquisitioncosts	0.001
CY2018	banr	Changeineffectiveincometaxrateduetomergerandacquisitioncosts Changeineffectiveincometaxrateduetomergerandacquisitioncosts	0.001
CY2017	banr	Changeineffectiveincometaxrateduetomergerandacquisitioncosts Changeineffectiveincometaxrateduetomergerandacquisitioncosts	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.025
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2019	banr	Increaseinfederalstatutoryincometaxratedueto2017 Tax Cutsand Jobs Act Increaseinfederalstatutoryincometaxratedueto2017TaxCutsandJobsAct	0
CY2018	banr	Increaseinfederalstatutoryincometaxratedueto2017 Tax Cutsand Jobs Act Increaseinfederalstatutoryincometaxratedueto2017TaxCutsandJobsAct	0
CY2017	banr	Increaseinfederalstatutoryincometaxratedueto2017 Tax Cutsand Jobs Act Increaseinfederalstatutoryincometaxratedueto2017TaxCutsandJobsAct	0.282
CY2019	banr	Effective Income Tax Rate Reconciliation State Audits And Amended Returns Percent EffectiveIncomeTaxRateReconciliationStateAuditsAndAmendedReturnsPercent	0.005
CY2018	banr	Effective Income Tax Rate Reconciliation State Audits And Amended Returns Percent EffectiveIncomeTaxRateReconciliationStateAuditsAndAmendedReturnsPercent	0
CY2017	banr	Effective Income Tax Rate Reconciliation State Audits And Amended Returns Percent EffectiveIncomeTaxRateReconciliationStateAuditsAndAmendedReturnsPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.014
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.011
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.201
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.173
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.598
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	24285000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	24156000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	17470000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	15991000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	32093000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	37828000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	7517000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	7614000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	5632000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	6105000	USD
CY2019Q4	banr	Deferred Tax Asset Loan Discount DeferredTaxAssetLoanDiscount	5466000	USD
CY2018Q4	banr	Deferred Tax Asset Loan Discount DeferredTaxAssetLoanDiscount	5756000	USD
CY2019Q4	banr	Deferred Tax Asset Fas115 DeferredTaxAssetFAS115	15485000	USD
CY2018Q4	banr	Deferred Tax Asset Fas115 DeferredTaxAssetFAS115	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	349000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	983000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	108297000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	98433000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5373000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3771000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	11525000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Financing Costs DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts	10197000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	7756000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	8428000	USD
CY2019Q4	banr	Deferredtaxliabilitiesrightofuseasset Deferredtaxliabilitiesrightofuseasset	14531000	USD
CY2018Q4	banr	Deferredtaxliabilitiesrightofuseasset Deferredtaxliabilitiesrightofuseasset	0	USD
CY2019Q4	banr	Deferred Tax Liabilities Financial Instruments Accounted For Under Fair Value Accounting DeferredTaxLiabilitiesFinancialInstrumentsAccountedForUnderFairValueAccounting	1143000	USD
CY2018Q4	banr	Deferred Tax Liabilities Financial Instruments Accounted For Under Fair Value Accounting DeferredTaxLiabilitiesFinancialInstrumentsAccountedForUnderFairValueAccounting	833000	USD
CY2019Q4	banr	Deferred Tax Liabilities Bargain Purchase Acquisition Loan Discount DeferredTaxLiabilitiesBargainPurchaseAcquisitionLoanDiscount	8146000	USD
CY2018Q4	banr	Deferred Tax Liabilities Bargain Purchase Acquisition Loan Discount DeferredTaxLiabilitiesBargainPurchaseAcquisitionLoanDiscount	0	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	48474000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	23229000	USD
CY2019Q4	banr	Deferred Tax Asset Gross Net Of Deferred Tax Liabilities DeferredTaxAssetGrossNetOfDeferredTaxLiabilities	59823000	USD
CY2018Q4	banr	Deferred Tax Asset Gross Net Of Deferred Tax Liabilities DeferredTaxAssetGrossNetOfDeferredTaxLiabilities	75204000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	184000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	184000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	59639000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	75020000	USD
CY2019Q4	banr	Operating Loss Carryforwards Amount Expected To Be Utilized On Annual Basis OperatingLossCarryforwardsAmountExpectedToBeUtilizedOnAnnualBasis	6900000	USD
CY2019Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	29620000	USD
CY2018Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	17360000	USD
CY2019Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	20235000	USD
CY2018Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	12726000	USD
CY2019	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1916000	USD
CY2018	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1456000	USD
CY2017	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	1140000	USD
CY2019	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1633000	USD
CY2018	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1151000	USD
CY2017	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	1144000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6200000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5400000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4800000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.04
CY2019Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	192100000	USD
CY2018Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	177500000	USD
CY2019Q4	us-gaap	Capital Capital	1386483000	USD
CY2019Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1293
CY2019Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	857546000	USD
CY2019Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2019Q4	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	1071933000	USD
CY2019Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000
CY2019Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	1283208000	USD
CY2019Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1197
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	643160000	USD
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2019Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	643160000	USD
CY2019Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0600
CY2019Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	1139708000	USD
CY2019Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.1063
CY2019Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	482370000	USD
CY2019Q4	banr	Tier One Risk Based Common Equity Requiredfor Capital Adequacyto Risk Weighted Assets TierOneRiskBasedCommonEquityRequiredforCapitalAdequacytoRiskWeightedAssets	0.0450
CY2019Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	1283208000	USD
CY2019Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1071
CY2019Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	479458000	USD
CY2019Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2018Q4	us-gaap	Capital Capital	1302239000	USD
CY2018Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1312
CY2018Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	794072000	USD
CY2018Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2018Q4	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	992590000	USD
CY2018Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000
CY2018Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	1203155000	USD
CY2018Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1212
CY2018Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	595554000	USD
CY2018Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2018Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	595554000	USD
CY2018Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0600
CY2018Q4	banr	Tier One Risk Based Common Equity TierOneRiskBasedCommonEquity	1067155000	USD
CY2018Q4	banr	Tier One Risk Based Common Equityto Risk Weighted Assets TierOneRiskBasedCommonEquitytoRiskWeightedAssets	0.1075
CY2018Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	446665000	USD
CY2018Q4	banr	Tier One Risk Based Common Equity Requiredfor Capital Adequacyto Risk Weighted Assets TierOneRiskBasedCommonEquityRequiredforCapitalAdequacytoRiskWeightedAssets	0.0450
CY2018Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	1203155000	USD
CY2018Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1098
CY2018Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	438379000	USD
CY2018Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2016Q4	us-gaap	Goodwill Goodwill	244583000	USD
CY2016Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	274745000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6431000	USD
CY2017	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-1924000	USD
CY2017	banr	Finite Lived Intangible Assets Other Changes FiniteLivedIntangibleAssetsOtherChanges	-1076000	USD
CY2017	banr	Intangible Assetsincluding Goodwill Other Changes IntangibleAssetsincludingGoodwillOtherChanges	-3000000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	242659000	USD
CY2017Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	265314000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	96495000	USD
CY2018	banr	Acquired Intangible Assets Including Goodwill AcquiredIntangibleAssetsIncludingGoodwill	112863000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6099000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	339154000	USD
CY2018Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	372078000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	33967000	USD
CY2019	banr	Acquired Intangible Assets Including Goodwill AcquiredIntangibleAssetsIncludingGoodwill	38577000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8151000	USD
CY2019	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	0	USD
CY2019	banr	Finite Lived Intangible Assets Other Changes FiniteLivedIntangibleAssetsOtherChanges	0	USD
CY2019	banr	Lhi Other Increase Decrease LHIOtherIncreaseDecrease	-225000	USD
CY2019	banr	Intangible Assetsincluding Goodwill Other Changes IntangibleAssetsincludingGoodwillOtherChanges	-225000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	373121000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	402279000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	7732000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6571000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5317000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3814000	USD
CY2019Q4	banr	Finite Lived Intangible Assets Amortization Expense After Year Four FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour	5724000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	29158000	USD
CY2019	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	168000	USD
CY2018	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	166000	USD
CY2017	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	94000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1915000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	53922000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	146278000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	136515000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	60776000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	34868434	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32784724	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	32888007	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	34967684	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32894425	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	32986707	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.20
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.16
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.85
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.18
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.15
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	367230	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	315301	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	302077	shares
CY2019Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	129996000	USD
CY2019Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	130838000	USD
CY2019Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	131436000	USD
CY2019Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	133409000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	13892000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	14143000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	14815000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	13918000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	116104000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	116695000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	116621000	USD
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	119491000	USD
CY2019Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2019Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2019Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2019Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4000000	USD
CY2019Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	114104000	USD
CY2019Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	114695000	USD
CY2019Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	114621000	USD
CY2019Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	115491000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	18125000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	22676000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	20866000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	20282000	USD
CY2019Q1	us-gaap	Noninterest Expense NoninterestExpense	90014000	USD
CY2019Q2	us-gaap	Noninterest Expense NoninterestExpense	86716000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	87308000	USD
CY2019Q4	us-gaap	Noninterest Expense NoninterestExpense	93690000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	42215000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	50655000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	48179000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	42083000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8869000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10955000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8602000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8428000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	33346000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	39700000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	39577000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	33655000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.14
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.96
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.14
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.15
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.95
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.41
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.41
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.41
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.41
CY2018Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	104820000	USD
CY2018Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	112423000	USD
CY2018Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	117648000	USD
CY2018Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	128741000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	5447000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	7360000	USD
CY2018Q3	us-gaap	Interest Expense InterestExpense	8570000	USD
CY2018Q4	us-gaap	Interest Expense InterestExpense	11282000	USD
CY2018Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	99373000	USD
CY2018Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	105063000	USD
CY2018Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	109078000	USD
CY2018Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	117459000	USD
CY2018Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2018Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2018Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2018Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2500000	USD
CY2018Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	97373000	USD
CY2018Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	103063000	USD
CY2018Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	107078000	USD
CY2018Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	114959000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	21362000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	21217000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	20411000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	21018000	USD
CY2018Q1	us-gaap	Noninterest Expense NoninterestExpense	81706000	USD
CY2018Q2	us-gaap	Noninterest Expense NoninterestExpense	82637000	USD
CY2018Q3	us-gaap	Noninterest Expense NoninterestExpense	81632000	USD
CY2018Q4	us-gaap	Noninterest Expense NoninterestExpense	95396000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	37029000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	41643000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	45857000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	40581000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8239000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9219000	USD
CY2018Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8084000	USD
CY2018Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3053000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	28790000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	32424000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	37773000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	37528000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.89
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.17
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.10
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.89
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.00
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.17
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.09
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.35
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.85
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.38
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.38
CY2017Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	99096000	USD
CY2017Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	104436000	USD
CY2017Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	105278000	USD
CY2017Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	103475000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	4242000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	4730000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	5068000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	5211000	USD
CY2017Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	94854000	USD
CY2017Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	99706000	USD
CY2017Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	100210000	USD
CY2017Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	98264000	USD
CY2017Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2017Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2017Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2017Q4	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2000000	USD
CY2017Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	92854000	USD
CY2017Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	97706000	USD
CY2017Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	98210000	USD
CY2017Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	96264000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	19048000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	20396000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	18081000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	27675000	USD
CY2017Q1	us-gaap	Noninterest Expense NoninterestExpense	76281000	USD
CY2017Q2	us-gaap	Noninterest Expense NoninterestExpense	79857000	USD
CY2017Q3	us-gaap	Noninterest Expense NoninterestExpense	80331000	USD
CY2017Q4	us-gaap	Noninterest Expense NoninterestExpense	82501000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	35621000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	38245000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	35960000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	41438000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11828000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12791000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10883000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	54986000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	23793000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	25454000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	25077000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-13548000	USD
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.72
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.76
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.41
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.72
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.77
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.41
CY2017Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.25
CY2017Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2017Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.25
CY2019Q4	banr	Reservefor Unfunded Loan Commitments ReserveforUnfundedLoanCommitments	2700000	USD
CY2018Q4	banr	Reservefor Unfunded Loan Commitments ReserveforUnfundedLoanCommitments	2600000	USD
CY2019	banr	Mortgage Loan Applications Day Interest Rate Is Locked MortgageLoanApplicationsDayInterestRateIsLocked	P45D
CY2019Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	15200000	USD
CY2018Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	1300000	USD
CY2019Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	28100000	USD
CY2018Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	13600000	USD
CY2019Q4	banr	Derivativesvariationmarginadjustment Derivativesvariationmarginadjustment	4300000	USD
CY2018Q4	banr	Derivativesvariationmarginadjustment Derivativesvariationmarginadjustment	0	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	15242000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	40000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	15202000	USD
CY2019Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2019Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	15202000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	15242000	USD
CY2019Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	4276000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	10966000	USD
CY2019Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	USD
CY2019Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	15209000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	-4243000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	5038000	USD
CY2018Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	1900000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	3138000	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2018Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	3138000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	5038000	USD
CY2018Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	1900000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	3138000	USD
CY2018Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	USD
CY2018Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	1320000	USD
CY2018Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	1818000	USD
CY2019	banr	Debit And Credit Card Interchange Fees DebitAndCreditCardInterchangeFees	27753000	USD
CY2018	banr	Debit And Credit Card Interchange Fees DebitAndCreditCardInterchangeFees	31713000	USD
CY2017	banr	Debit And Credit Card Interchange Fees DebitAndCreditCardInterchangeFees	28358000	USD
CY2019	banr	Debitand Credit Card Expense DebitandCreditCardExpense	-8527000	USD
CY2018	banr	Debitand Credit Card Expense DebitandCreditCardExpense	-8511000	USD
CY2017	banr	Debitand Credit Card Expense DebitandCreditCardExpense	-7390000	USD
CY2019	banr	Merchant Services Expenses MerchantServicesExpenses	-10512000	USD
CY2018	banr	Merchant Services Expenses MerchantServicesExpenses	-7767000	USD
CY2017	banr	Merchant Services Expenses MerchantServicesExpenses	-8335000	USD
CY2019	banr	Other Service Charges OtherServiceCharges	5571000	USD
CY2018	banr	Other Service Charges OtherServiceCharges	4324000	USD
CY2017	banr	Other Service Charges OtherServiceCharges	3935000	USD
CY2019	banr	Total Deposit Feesand Other Service Charges TotalDepositFeesandOtherServiceCharges	46632000	USD
CY2018	banr	Total Deposit Feesand Other Service Charges TotalDepositFeesandOtherServiceCharges	48074000	USD
CY2017	banr	Total Deposit Feesand Other Service Charges TotalDepositFeesandOtherServiceCharges	43452000	USD
CY2019Q4	banr	Operating Leases Numberof Properties Subjectto Noncancelable Operating Leases OperatingLeasesNumberofPropertiesSubjecttoNoncancelableOperatingLeases	107
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	61766000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	65818000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y2M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.037
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	15388000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	327000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	2396000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	925000	USD
CY2019	banr	Lessee Operating Leases Total Cost LesseeOperatingLeasesTotalCost	17186000	USD
CY2019	banr	Operating Leases Cash Flows Amounts Paid OperatingLeasesCashFlowsAmountsPaid	15400000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	78800000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	16197000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	15058000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	11424000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	8275000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	6393000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	16489000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	73836000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	8018000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	65818000	USD

Files In Submission

Name	View Source	Status
0000946673-20-000004-index-headers.html	Edgar Link	pending
0000946673-20-000004-index.html	Edgar Link	pending
0000946673-20-000004.txt	Edgar Link	pending
0000946673-20-000004-xbrl.zip	Edgar Link	pending
banr-12312019x10k.htm	Edgar Link	pending
banr-12312019x10k_htm.xml	Edgar Link	completed
banr-12312019xex21.htm	Edgar Link	pending
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banr-20191231.xsd	Edgar Link	pending
banr-20191231_cal.xml	Edgar Link	unprocessable
banr-20191231_def.xml	Edgar Link	unprocessable
banr-20191231_lab.xml	Edgar Link	unprocessable
banr-20191231_pre.xml	Edgar Link	unprocessable
chart-fa77becf41c55863ab1.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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$BANR
BANNER CORP Stock $banr

2018 Q4 Form 10-K Financial Statement

#000094667320000004 Filed on February 21, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BANR BANNER CORP Stock $banr

2018 Q4 Form 10-K Financial Statement

#000094667320000004 Filed on February 21, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$BANR
BANNER CORP Stock $banr