$BLKB
BLACKBAUD INC Stock $blkb

$blkb Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000128005819000007 Filed on February 20, 2019

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$217.4M	$194.4M	$191.6M
YoY Change	9.63%	6.21%	6.33%
Cost Of Revenue	$102.4M	$87.01M	$87.00M
YoY Change	10.82%	4.43%	4.05%
Gross Profit	$115.0M	$107.4M	$104.6M
YoY Change	8.57%	7.69%	8.3%
Gross Profit Margin	52.89%	55.25%	54.59%
Selling, General & Admin	$70.90M	$66.19M	$64.46M
YoY Change	19.56%	5.05%	8.34%
% of Gross Profit	61.66%	61.62%	61.63%
Research & Development	$22.30M	$22.07M	$22.87M
YoY Change	1.83%	-1.95%	0.54%
% of Gross Profit	19.39%	20.55%	21.87%
Depreciation & Amortization	$19.10M	$18.30M	$18.40M
YoY Change	9.77%	3.98%	2.79%
% of Gross Profit	16.61%	17.04%	17.59%
Operating Expenses	$94.20M	$89.00M	$88.07M
YoY Change	15.02%	3.24%	6.17%
Operating Profit	$19.96M	$18.42M	$16.52M
YoY Change	-16.92%	36.06%	21.28%
Interest Expense	-$3.200M	$3.092M	$3.216M
YoY Change	28.0%	17.08%	18.19%
% of Operating Profit	-16.03%	16.78%	19.46%
Other Income/Expense, Net	$500.0K	$215.0K	$304.0K
YoY Change	-600.0%	-189.96%	-266.12%
Pretax Income	$17.23M	$15.80M	$14.13M
YoY Change	-19.4%	45.16%	30.41%
Income Tax	$600.0K	$2.975M	$3.105M
% Of Pretax Income	3.48%	18.83%	21.97%
Net Earnings	$36.64M	$12.82M	$11.03M
YoY Change	111.98%	43.54%	21.73%
Net Earnings / Revenue	16.85%	6.6%	5.76%
Basic Earnings Per Share	$0.78	$0.27	$0.24
Diluted Earnings Per Share	$0.76	$0.27	$0.23
COMMON SHARES
Basic Shares Outstanding	48.09M shares	46.71M shares	46.66M shares
Diluted Shares Outstanding		47.85M shares	47.69M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$32.10M	$17.10M	$17.30M
YoY Change	89.94%	3.64%	13.07%
Cash & Equivalents	$29.83M	$17.05M	$17.27M
Short-Term Investments	$2.300M
Other Short-Term Assets	$656.3M	$189.2M	$340.5M
YoY Change	64.9%	2.1%	40.41%
Inventory
Prepaid Expenses
Receivables	$95.68M	$100.9M	$129.9M
Other Receivables	$12.10M	$0.00	$0.00
Total Short-Term Assets	$799.4M	$307.1M	$487.7M
YoY Change	57.38%	4.87%	31.15%
LONG-TERM ASSETS
Property, Plant & Equipment	$42.24M	$43.90M	$45.68M
YoY Change	-15.97%	-16.32%	-15.63%
Goodwill	$530.2M	$472.8M	$472.6M
YoY Change	21.0%	7.83%	8.4%
Intangibles	$314.7M	$252.7M	$263.3M
YoY Change	24.04%	-4.42%	-3.69%
Long-Term Investments
YoY Change
Other Assets	$57.24M	$21.89M	$24.08M
YoY Change	9.87%	20.92%	10.22%
Total Long-Term Assets	$998.5M	$839.9M	$850.7M
YoY Change	24.45%	4.21%	4.61%
TOTAL ASSETS
Total Short-Term Assets	$799.4M	$307.1M	$487.7M
Total Long-Term Assets	$998.5M	$839.9M	$850.7M
Total Assets	$1.798B	$1.147B	$1.338B
YoY Change	37.22%	4.39%	12.94%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$24.70M	$17.80M	$17.70M
YoY Change	6.01%	-9.18%	-36.33%
Accrued Expenses	$44.20M	$32.70M	$34.30M
YoY Change	20.11%	-10.9%	-4.46%
Deferred Revenue	$275.1M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$8.576M	$8.576M	$7.500M
YoY Change	96.02%	96.02%	71.43%
Total Short-Term Liabilities	$974.6M	$488.2M	$641.7M
YoY Change	43.3%	7.36%	22.84%
LONG-TERM LIABILITIES
Long-Term Debt	$429.6M	$329.4M	$380.2M
YoY Change	27.11%	-11.13%	-4.69%
Other Long-Term Liabilities	$5.632M	$7.799M	$7.572M
YoY Change	-34.0%	4.45%	-6.54%
Total Long-Term Liabilities	$435.3M	$337.2M	$387.7M
YoY Change	25.6%	-10.82%	-4.73%
TOTAL LIABILITIES
Total Short-Term Liabilities	$974.6M	$488.2M	$641.7M
Total Long-Term Liabilities	$435.3M	$337.2M	$387.7M
Total Liabilities	$1.462B	$870.1M	$1.076B
YoY Change	37.54%	0.47%	11.72%
SHAREHOLDERS EQUITY
Retained Earnings	$225.0M	$170.7M	$163.9M
YoY Change	29.02%	20.96%	18.87%
Common Stock	$351.1M	$341.5M	$330.6M
YoY Change	13.07%	12.76%	12.43%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$239.2M	$234.3M	$231.9M
YoY Change	11.13%	11.4%	11.54%
Treasury Stock Shares	10.48M shares	10.43M shares	10.40M shares
Shareholders Equity	$336.3M	$276.9M	$262.1M
YoY Change
Total Liabilities & Shareholders Equity	$1.798B	$1.147B	$1.338B
YoY Change	37.22%	4.39%	12.94%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	$36.64M	$12.82M	$11.03M
YoY Change	111.98%	43.54%	21.73%
Depreciation, Depletion And Amortization	$19.10M	$18.30M	$18.40M
YoY Change	9.77%	3.98%	2.79%
Cash From Operating Activities	$52.90M	$68.80M	$41.80M
YoY Change	-1.12%	34.11%	-0.48%
INVESTING ACTIVITIES
Capital Expenditures	-$9.600M	-$9.700M	-$10.00M
YoY Change	0.0%	-1.02%	-9.91%
Acquisitions
YoY Change
Other Investing Activities	-$97.10M	$1.000M	-$50.30M
YoY Change		-125.64%	-10160.0%
Cash From Investing Activities	-$106.7M	-$8.700M	-$60.30M
YoY Change	1023.16%	-36.5%	468.87%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	538.2M	-189.3M	132.5M
YoY Change	921.25%	417.21%	-581.82%
NET CHANGE
Cash From Operating Activities	52.90M	68.80M	41.80M
Cash From Investing Activities	-106.7M	-8.700M	-60.30M
Cash From Financing Activities	538.2M	-189.3M	132.5M
Net Change In Cash	484.4M	-129.2M	114.0M
YoY Change	400.93%	-13020.0%	2823.08%
FREE CASH FLOW
Cash From Operating Activities	$52.90M	$68.80M	$41.80M
Capital Expenditures	-$9.600M	-$9.700M	-$10.00M
Free Cash Flow	$62.50M	$78.50M	$51.80M
YoY Change	-0.95%	28.48%	-2.45%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2017	blkb	Surrender Of Shares Upon Restricted Stock And Restricted Unit Vesting And Exerciseof Stock Appreciation Rights SurrenderOfSharesUponRestrictedStockAndRestrictedUnitVestingAndExerciseofStockAppreciationRights	308993	shares
CY2018	blkb	Surrender Of Shares Upon Restricted Stock And Restricted Unit Vesting And Exerciseof Stock Appreciation Rights SurrenderOfSharesUponRestrictedStockAndRestrictedUnitVestingAndExerciseofStockAppreciationRights	284780	shares
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q4
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0001280058
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CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q2	dei	Entity Public Float EntityPublicFloat	4380929403	USD
CY2018	dei	Entity Registrant Name EntityRegistrantName	BLACKBAUD INC
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2018	dei	Trading Symbol TradingSymbol	blkb
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CY2016	blkb	Nonoperating Income Expense Excluding Interest Expense NonoperatingIncomeExpenseExcludingInterestExpense	-291000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58341000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	57350000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-219000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15292000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11946000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	44841000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	73633000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	45404000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.98
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.54
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47206669	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46669440	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46132389	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48045084	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47775702	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47316538	shares
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-5218000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-789000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	205000	USD
CY2018	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	583000	USD
CY2017	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	751000	USD
CY2016	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	44000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4635000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-38000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	249000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	40206000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	73595000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	45653000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	44841000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	73633000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	45404000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	79566000	USD
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	73948000	USD
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	70491000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	6890000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11686000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3730000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	48274000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	40631000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	32638000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-619000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-17814000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5415000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	752000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	838000	USD
CY2016	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	958000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1912000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-504000	USD
CY2016	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	864000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-2166000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	15821000	USD
CY2016	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13007000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	5217000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	9550000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	8495000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	9487000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	1024000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	3689000	USD
CY2018	blkb	Increase Decrease Accrued Expenses And Other Liabilities IncreaseDecreaseAccruedExpensesAndOtherLiabilities	-2027000	USD
CY2017	blkb	Increase Decrease Accrued Expenses And Other Liabilities IncreaseDecreaseAccruedExpensesAndOtherLiabilities	-4973000	USD
CY2016	blkb	Increase Decrease Accrued Expenses And Other Liabilities IncreaseDecreaseAccruedExpensesAndOtherLiabilities	-751000	USD
CY2018	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	19184000	USD
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	22184000	USD
CY2016	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	14420000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	201385000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	176290000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	153628000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14719000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10208000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17694000	USD
CY2018	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	37629000	USD
CY2017	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	28345000	USD
CY2016	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	26359000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	44943000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	146789000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3377000	USD
CY2018	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	0	USD
CY2017	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	568000	USD
CY2016	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	0	USD
CY2018	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	0	USD
CY2017	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	1030000	USD
CY2016	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	0	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	500000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-97791000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-184880000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-47430000	USD
CY2018	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	270900000	USD
CY2017	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	774500000	USD
CY2016	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	227200000	USD
CY2018	us-gaap	Repayments Of Debt RepaymentsOfDebt	322476000	USD
CY2017	us-gaap	Repayments Of Debt RepaymentsOfDebt	679119000	USD
CY2016	us-gaap	Repayments Of Debt RepaymentsOfDebt	293575000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3085000	USD
CY2016	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	27685000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	23962000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	15376000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	11000	USD
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	15000	USD
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	16000	USD
CY2018	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	-188502000	USD
CY2017	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	226717000	USD
CY2016	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	96000000	USD
CY2018	blkb	Change In Customer Funds Receivable ChangeInCustomerFundsReceivable	-844000	USD
CY2017	blkb	Change In Customer Funds Receivable ChangeInCustomerFundsReceivable	6644000	USD
CY2016	blkb	Change In Customer Funds Receivable ChangeInCustomerFundsReceivable	0	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	23312000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	23069000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	22811000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-291908000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	278641000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-8546000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-2014000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-550000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2622000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-190328000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	269501000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	100274000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	640174000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	370673000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	270399000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	449846000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	640174000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	370673000	USD
CY2018	us-gaap	Interest Paid InterestPaid	15261000	USD
CY2017	us-gaap	Interest Paid InterestPaid	10614000	USD
CY2016	us-gaap	Interest Paid InterestPaid	9608000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7138000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-5613000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1340000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	882000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1546000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3155000	USD
CY2018	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2017	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	31644000	USD
CY2016	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	30866000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	29830000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	418980000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	610344000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	449846000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	640174000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	210588000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	45404000	USD
CY2016	us-gaap	Dividends Cash DividendsCash	22811000	USD
CY2016	blkb	Exercise Of Stock Options And Stock Appreciation Rights Value ExerciseOfStockOptionsAndStockAppreciationRightsValue	16000	USD
CY2016	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	15376000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	32638000	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	1000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	249000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	269078000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	73633000	USD
CY2017	us-gaap	Dividends Cash DividendsCash	23069000	USD
CY2017	blkb	Exercise Of Stock Options And Stock Appreciation Rights Value ExerciseOfStockOptionsAndStockAppreciationRightsValue	15000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	7500000	USD
CY2017	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	23962000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	40631000	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	1000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-38000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	336289000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	44841000	USD
CY2018	us-gaap	Dividends Cash DividendsCash	23312000	USD
CY2018	blkb	Exercise Of Stock Options And Stock Appreciation Rights Value ExerciseOfStockOptionsAndStockAppreciationRightsValue	11000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	27685000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	48274000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4635000	USD
CY2018	blkb	Stockholders Equity Asu201802 Adoption StockholdersEquityASU201802Adoption	0	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	373783000	USD
CY2018Q4	blkb	Active Customers ActiveCustomers	45000	Customers
CY2018	us-gaap	Use Of Estimates UseOfEstimates	Use of estimatesThe preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenues and expenses during the reporting periods. On an ongoing basis, we reconsider and evaluate our estimates and assumptions, including those that impact revenue recognition, long-lived and intangible assets including goodwill, income taxes, business combinations, stock-based compensation, capitalization of software development costs, our allowances for sales returns and doubtful accounts, costs of obtaining contracts, valuation of derivative instruments and loss contingencies, among others. Changes in the facts or circumstances underlying these estimates could result in material changes and actual results could materially differ from these estimates.
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	88261000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	95679000	USD
CY2016Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	54211000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	61978000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	52097000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	57238000	USD
CY2016Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	243849000	USD
CY2017Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	275063000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	43475000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	48023000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	174409000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	225029000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	731642000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	788487000	USD
CY2016	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	339220000	USD
CY2017	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	361904000	USD
CY2016	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	150157000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	169559000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	45404000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	73633000	USD
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.98
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.54
CY2018	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	Recently issued accounting pronouncements<span style="font-family:Frutiger LT 45 Light,sans-serif;font-size:10pt;">In February 2016, the FASB issued ASU 2016-02, </span><span style="font-family:Frutiger LT 45 Light,sans-serif;font-size:10pt;font-style:italic;">Leases (Topic 842) </span>("ASU 2016-02"). ASU 2016-02 will require lessees to record most leases on their balance sheets but recognize expenses in the income statement in a manner similar to current guidance. The updated guidance also eliminates certain real estate-specific provisions and changes the guidance on sale-leaseback transactions, initial direct costs and lease executory costs for all entities. All entities will classify leases to determine how to recognize lease-related revenue and expense. Upon adoption, entities will be required to use a modified retrospective approach with an option to use certain practical expedients. We expect to adopt ASU 2016-02 when effective, using the transition method that allows us to initially apply the guidance at the adoption date of January 1, 2019 and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. We expect to use the package of practical expedients that allows us to not reassess: (1) whether any expired or existing contracts are or contain leases, (2) lease classification for any expired or existing leases and (3) initial direct costs for any expired or existing leases. We expect ASU 2016-02 will impact our consolidated financial statements and related disclosures. We are currently evaluating the extent of the impact and expect that most of our lease commitments will be subject to the updated guidance and recognized as lease liabilities and right-of-use assets on our consolidated balance sheets upon adoption.
CY2018	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Concentration of credit riskFinancial instruments that potentially subject us to concentrations of credit risk consist of cash and cash equivalents, restricted cash due to customers and accounts receivable. Our cash and cash equivalents and restricted cash due to customers are placed with high credit-quality financial institutions. Our accounts receivable is derived from sales to customers who primarily operate in the nonprofit sector. With respect to accounts receivable, we perform ongoing evaluations of our customers and maintain an allowance for doubtful accounts based on historical experience and our expectations of future losses.
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	900000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-1100000	USD
CY2018	us-gaap	Revenue Recognition Sales Returns RevenueRecognitionSalesReturns	Sales returns and allowance for doubtful accountsWe maintain a reserve for returns and credits which is estimated based on several factors including historical experience, known credits yet to be issued, the aging of customer accounts and the nature of service level commitments. A considerable amount of judgment is required in assessing these factors. Provisions for sales returns and credits are charged against the related revenue items.
CY2018	us-gaap	Advertising Expense AdvertisingExpense	4000000.0	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	2400000	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	2300000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	530249000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	18271000	USD
CY2018	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-333000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-2974000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	545213000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	547221000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	524007000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-257204000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	-210956000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	291617000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	314651000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	47077000	USD
CY2017	us-gaap	Adjustment For Amortization AdjustmentForAmortization	43370000	USD
CY2016	us-gaap	Adjustment For Amortization AdjustmentForAmortization	42398000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	36995000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	31453000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	27969000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	26213000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	44841000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	73633000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	45404000	USD
CY2018Q4	blkb	Estimated Amortization Expensefor Finite Lived Intangible Assetsforthe Next Five Years EstimatedAmortizationExpenseforFiniteLivedIntangibleAssetsfortheNextFiveYears	167896000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	45266000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47206669	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46669440	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46132389	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	838415	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1106262	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1184149	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	48045084	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47775702	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47316538	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.95
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.58
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.98
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.54
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	48881	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4634	shares
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7339	shares
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	147629000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	145843000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	107598000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	103600000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	40031000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	42243000	USD
CY2018	us-gaap	Depreciation Depreciation	15900000	USD
CY2017	us-gaap	Depreciation Depreciation	17800000	USD
CY2016	us-gaap	Depreciation Depreciation	19800000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	121983000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	84404000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	46884000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	30306000	USD
CY2018Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	75099000	USD
CY2017Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	54098000	USD
CY2018	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	16600000	USD
CY2017	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	12800000	USD
CY2016	us-gaap	Capitalized Computer Software Amortization1 CapitalizedComputerSoftwareAmortization1	8300000	USD
CY2018Q4	us-gaap	Accrued Vacation Current And Noncurrent AccruedVacationCurrentAndNoncurrent	2352000	USD
CY2017Q4	us-gaap	Accrued Vacation Current And Noncurrent AccruedVacationCurrentAndNoncurrent	2458000	USD
CY2018Q4	us-gaap	Accrued Insurance Current And Noncurrent AccruedInsuranceCurrentAndNoncurrent	1497000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	85590000	USD
CY2017Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	77312000	USD
CY2018Q4	blkb	Prepaid Software Maintenance Current And Long Term PrepaidSoftwareMaintenanceCurrentAndLongTerm	21134000	USD
CY2017Q4	blkb	Prepaid Software Maintenance Current And Long Term PrepaidSoftwareMaintenanceCurrentAndLongTerm	17402000	USD
CY2018Q4	blkb	Taxes Prepaid And Receivable Current And Long Term TaxesPrepaidAndReceivableCurrentAndLongTerm	2055000	USD
CY2017Q4	blkb	Taxes Prepaid And Receivable Current And Long Term TaxesPrepaidAndReceivableCurrentAndLongTerm	10548000	USD
CY2018Q4	blkb	Derivative Instruments Currentand Longterm DerivativeInstrumentsCurrentandLongterm	2260000	USD
CY2017Q4	blkb	Derivative Instruments Currentand Longterm DerivativeInstrumentsCurrentandLongterm	1283000	USD
CY2018Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	4161000	USD
CY2017Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	3136000	USD
CY2018Q4	us-gaap	Security Deposit SecurityDeposit	1020000	USD
CY2017Q4	us-gaap	Security Deposit SecurityDeposit	2305000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	8931000	USD
CY2017Q4	us-gaap	Other Assets OtherAssets	7230000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	125151000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	119216000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Noncurrent PrepaidExpenseAndOtherAssetsNoncurrent	65363000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Noncurrent PrepaidExpenseAndOtherAssetsNoncurrent	57238000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	59788000	USD
CY2017Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	61978000	USD
CY2018	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	35700000	USD
CY2018Q4	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	31700000	USD
CY2017Q4	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	28000000.0	USD
CY2018Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	14868000	USD
CY2017Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	16743000	USD
CY2018Q4	blkb	Accrued Commissions And Salaries Current And Long Term AccruedCommissionsAndSalariesCurrentAndLongTerm	9934000	USD
CY2017Q4	blkb	Accrued Commissions And Salaries Current And Long Term AccruedCommissionsAndSalariesCurrentAndLongTerm	6943000	USD
CY2018Q4	us-gaap	Taxes Payable Current And Noncurrent TaxesPayableCurrentAndNoncurrent	6204000	USD
CY2017Q4	us-gaap	Taxes Payable Current And Noncurrent TaxesPayableCurrentAndNoncurrent	5517000	USD
CY2018Q4	us-gaap	Accrued Rent Current And Noncurrent AccruedRentCurrentAndNoncurrent	4332000	USD
CY2017Q4	us-gaap	Accrued Rent Current And Noncurrent AccruedRentCurrentAndNoncurrent	4548000	USD
CY2018Q4	blkb	Accrued Customer Credit Balances Current And Long Term AccruedCustomerCreditBalancesCurrentAndLongTerm	4076000	USD
CY2018Q4	blkb	Unrecognized Tax Benefit Currentand Longterm UnrecognizedTaxBenefitCurrentandLongterm	2719000	USD
CY2017Q4	blkb	Unrecognized Tax Benefit Currentand Longterm UnrecognizedTaxBenefitCurrentandLongterm	1972000	USD
CY2017Q4	blkb	Accrued Customer Credit Balances Current And Long Term AccruedCustomerCreditBalancesCurrentAndLongTerm	4652000	USD
CY2018Q4	us-gaap	Lease Incentive Payable Current And Noncurrent LeaseIncentivePayableCurrentAndNoncurrent	3514000	USD
CY2017Q4	us-gaap	Lease Incentive Payable Current And Noncurrent LeaseIncentivePayableCurrentAndNoncurrent	4635000	USD
CY2017Q4	us-gaap	Accrued Insurance Current And Noncurrent AccruedInsuranceCurrentAndNoncurrent	2615000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	6785000	USD
CY2017Q4	us-gaap	Other Liabilities OtherLiabilities	9948000	USD
CY2018Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	56281000	USD
CY2017Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	60031000	USD
CY2018Q4	blkb	Accrued Expenses And Other Liabilities Non Current AccruedExpensesAndOtherLiabilitiesNonCurrent	9388000	USD
CY2017Q4	blkb	Accrued Expenses And Other Liabilities Non Current AccruedExpensesAndOtherLiabilitiesNonCurrent	5632000	USD
CY2018Q4	blkb	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	46893000	USD
CY2017Q4	blkb	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	54399000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	298555000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	278706000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	2564000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	3643000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	295991000	USD
CY2017Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	275063000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	2008000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	993000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	581000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	462000	USD
CY2016	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-299000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-905000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1104000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-872000	USD
CY2018	blkb	Nonoperating Income Expense Excluding Interest Expense NonoperatingIncomeExpenseExcludingInterestExpense	1103000	USD
CY2017	blkb	Nonoperating Income Expense Excluding Interest Expense NonoperatingIncomeExpenseExcludingInterestExpense	2260000	USD
CY2016	blkb	Nonoperating Income Expense Excluding Interest Expense NonoperatingIncomeExpenseExcludingInterestExpense	-291000	USD
CY2018Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	388750000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	440326000	USD
CY2018Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0361
CY2017Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0271
CY2018Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-1626000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	-2102000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	7500000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	8576000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	379624000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	429648000	USD
CY2014Q1	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	325000000.0	USD
CY2017Q2	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	700000000.0	USD
CY2014Q1	blkb	Changein Present Valueof Future Cash Flowsto Financing Investors ChangeinPresentValueofFutureCashFlowstoFinancingInvestors	0.10
CY2017Q2	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3100000	USD
CY2017Q2	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1000000.0	USD
CY2018Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	900000	USD
CY2017Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	1200000	USD
CY2017Q2	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	1800000	USD
CY2018	us-gaap	Line Of Credit Facility Unused Capacity Commitment Fee Percentage LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	0.0020
CY2017Q2	blkb	Lineof Credit Facility Available Increase Capacity Amount LineofCreditFacilityAvailableIncreaseCapacityAmount	200000000.0	USD
CY2018Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	296200000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	7500000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	7500000	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	366250000	USD
CY2017	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	1000000.0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2018Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	0	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	388750000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	238000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	17000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	20274000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	16924000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	14391000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	12923000	USD
CY2018	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	1000000.0	USD
CY2017	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-462000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	7200000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	22200000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	16100000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	11700000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Remainder Of Fiscal Year OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear	20808000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	81755000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	167075000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1088000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2565000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4808000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1182000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-144000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1670000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	306000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	101000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	53000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	400000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2522000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6531000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	659000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-17128000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4782000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	45000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	398000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	304000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1323000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1084000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	329000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-619000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-17814000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5415000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-219000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15292000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	58000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11946000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-604000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	47532000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	58547000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	55381000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-2910000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-206000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	1969000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	44622000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58341000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	57350000	USD
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
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.041
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.018
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.042
CY2018	blkb	Effective Income Tax Rate Reconciliation Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationUnrecognizedTaxBenefits	-0.026
CY2017	blkb	Effective Income Tax Rate Reconciliation Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationUnrecognizedTaxBenefits	0.015
CY2016	blkb	Effective Income Tax Rate Reconciliation Unrecognized Tax Benefits EffectiveIncomeTaxRateReconciliationUnrecognizedTaxBenefits	0.001
CY2018	blkb	Effective Income Tax Rate Reconciliation Tax Credits State And Local EffectiveIncomeTaxRateReconciliationTaxCreditsStateAndLocal	0.019
CY2017	blkb	Effective Income Tax Rate Reconciliation Tax Credits State And Local EffectiveIncomeTaxRateReconciliationTaxCreditsStateAndLocal	0.014
CY2016	blkb	Effective Income Tax Rate Reconciliation Tax Credits State And Local EffectiveIncomeTaxRateReconciliationTaxCreditsStateAndLocal	0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.004
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.010
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.014
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.104
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.058
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.055
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.002
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.002
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.004
CY2018	blkb	Effective Income Tax Rate Reconciliation Aquisition Costs EffectiveIncomeTaxRateReconciliationAquisitionCosts	0
CY2017	blkb	Effective Income Tax Rate Reconciliation Aquisition Costs EffectiveIncomeTaxRateReconciliationAquisitionCosts	0.022
CY2016	blkb	Effective Income Tax Rate Reconciliation Aquisition Costs EffectiveIncomeTaxRateReconciliationAquisitionCosts	0.001
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.042
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.011
CY2018	blkb	Effective Income Tax Rate Reconciliation Deduction Excess Tax Benefit Deficiency Percent EffectiveIncomeTaxRateReconciliationDeductionExcessTaxBenefitDeficiencyPercent	0.174
CY2017	blkb	Effective Income Tax Rate Reconciliation Deduction Excess Tax Benefit Deficiency Percent EffectiveIncomeTaxRateReconciliationDeductionExcessTaxBenefitDeficiencyPercent	0.189
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.025
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.015
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0
CY2016	blkb	Effective Income Tax Rate Reconciliation Deduction Excess Tax Benefit Deficiency Percent EffectiveIncomeTaxRateReconciliationDeductionExcessTaxBenefitDeficiencyPercent	0.121
CY2018	blkb	Effective Income Tax Rate Reconciliation Deduction Tcjafdii Percent EffectiveIncomeTaxRateReconciliationDeductionTCJAFDIIPercent	0.007
CY2017	blkb	Effective Income Tax Rate Reconciliation Deduction Tcjafdii Percent EffectiveIncomeTaxRateReconciliationDeductionTCJAFDIIPercent	0
CY2016	blkb	Effective Income Tax Rate Reconciliation Deduction Tcjafdii Percent EffectiveIncomeTaxRateReconciliationDeductionTCJAFDIIPercent	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.026
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.008
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	0.009
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.005
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.262
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.208
CY2018Q4	blkb	Deferred Tax Assets Operating Loss Carryforwards Domestic And State DeferredTaxAssetsOperatingLossCarryforwardsDomesticAndState	11021000	USD
CY2017Q4	blkb	Deferred Tax Assets Operating Loss Carryforwards Domestic And State DeferredTaxAssetsOperatingLossCarryforwardsDomesticAndState	13597000	USD
CY2018Q4	blkb	Deferred Tax Assets Tax Credit Carryforwards State And Foreign DeferredTaxAssetsTaxCreditCarryforwardsStateAndForeign	18936000	USD
CY2017Q4	blkb	Deferred Tax Assets Tax Credit Carryforwards State And Foreign DeferredTaxAssetsTaxCreditCarryforwardsStateAndForeign	14389000	USD
CY2018Q4	blkb	Deferred Tax Asset Intangible Assets DeferredTaxAssetIntangibleAssets	1041000	USD
CY2017Q4	blkb	Deferred Tax Asset Intangible Assets DeferredTaxAssetIntangibleAssets	693000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	11462000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	9611000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses	973000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses	1001000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	854000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	505000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1242000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	1379000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5607000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4770000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	51136000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	45945000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	43700000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	47997000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	86312000	USD
CY2018Q4	blkb	Deferred Tax Liabilities Deferred Expense Sales Commissions DeferredTaxLiabilitiesDeferredExpenseSalesCommissions	19573000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	19469000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Software DeferredTaxLiabilitiesDeferredExpenseCapitalizedSoftware	14012000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4444000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4552000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	926000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	6855000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	7205000	USD
CY2017Q4	blkb	Deferred Tax Liabilities Deferred Expense Sales Commissions DeferredTaxLiabilitiesDeferredExpenseSalesCommissions	18756000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	995000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	88112000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	43831000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	47572000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	7205000	USD
CY2018	blkb	Change In Valuation Allowance Related To Acquisition ChangeInValuationAllowanceRelatedToAcquisition	16000	USD
CY2018	blkb	Change In Valuation Allowance Charges To Expense ChangeInValuationAllowanceChargesToExpense	-366000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	6855000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	6994000	USD
CY2017	blkb	Change In Valuation Allowance Related To Acquisition ChangeInValuationAllowanceRelatedToAcquisition	0	USD
CY2017	blkb	Change In Valuation Allowance Charges To Expense ChangeInValuationAllowanceChargesToExpense	211000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	7205000	USD
CY2015Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	7911000	USD
CY2016	blkb	Change In Valuation Allowance Related To Acquisition ChangeInValuationAllowanceRelatedToAcquisition	0	USD
CY2016	blkb	Change In Valuation Allowance Charges To Expense ChangeInValuationAllowanceChargesToExpense	-917000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	6994000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5160000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3145000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3024000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	104000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1860000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	23000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	413000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	404000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1205000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	11000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	358000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	17226000	USD
CY2018Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	1400000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	4347224	shares
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	243000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3704000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5160000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3145000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3300000	USD
CY2018Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	700000	USD
CY2017Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	800000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	48274000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	40631000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	32638000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	74100000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M12D
CY2018Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2018Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2018Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2018Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.12
CY2010Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	50000000.0	USD
CY2018Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	50000000.0	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-642000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-604000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-825000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-5110000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-642000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	13273000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7100000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7600000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.50
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	8100000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	40031000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	42243000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	738000000	USD
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.60
CY2018Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2018Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	308000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Gross ContractWithCustomerAssetGross	0	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	298555000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	278706000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	270000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	848606000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	788487000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	731642000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	848606000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	14679000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	788487000	USD
CY2016	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	731642000	USD
CY2018Q4	us-gaap	Revenues Revenues	221218000	USD
CY2018Q3	us-gaap	Revenues Revenues	209532000	USD
CY2018Q2	us-gaap	Revenues Revenues	213672000	USD
CY2018Q1	us-gaap	Revenues Revenues	204184000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	117922000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	114295000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	118500000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	116147000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	15783000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	11374000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	17581000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11485000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11496000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	7417000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	14224000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	9334000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	11164000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	6592000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	17751000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.38
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.37
CY2017Q4	us-gaap	Revenues Revenues	217402000	USD
CY2017Q3	us-gaap	Revenues Revenues	194424000	USD
CY2017Q2	us-gaap	Revenues Revenues	191589000	USD
CY2017Q1	us-gaap	Revenues Revenues	185072000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	114980000	USD
CY2017Q3	us-gaap	Gross Profit GrossProfit	107419000	USD
CY2017Q2	us-gaap	Gross Profit GrossProfit	104594000	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	99590000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	15799000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	14134000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	19959000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	18423000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	16523000	USD
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.78
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	36638000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	11029000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	13142000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	12824000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	11182000	USD
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.24
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2018Q4	us-gaap	Restructuring And Related Cost Cost Incurred To Date1 RestructuringAndRelatedCostCostIncurredToDate1	5400000	USD
CY2018	us-gaap	Business Exit Costs1 BusinessExitCosts1	3581000	USD
CY2018	us-gaap	Other Restructuring Costs OtherRestructuringCosts	1009000	USD
CY2018	us-gaap	Restructuring Costs RestructuringCosts	4590000	USD
CY2018Q4	us-gaap	Restructuring And Related Cost Cost Incurred To Date1 RestructuringAndRelatedCostCostIncurredToDate1	5384000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	691000	USD
CY2018	us-gaap	Restructuring Reserve Period Increase Decrease RestructuringReservePeriodIncreaseDecrease	4590000	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	3366000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	1915000	USD

Files In Submission

Name	View Source	Status
0001280058-19-000007-index-headers.html	Edgar Link	pending
0001280058-19-000007-index.html	Edgar Link	pending
0001280058-19-000007.txt	Edgar Link	pending
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blkb-20181231_cal.xml	Edgar Link	unprocessable
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blkb-20181231_pre.xml	Edgar Link	unprocessable
chart-5765a42dbbf45711852.jpg	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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2017 Q4 Form 10-K Financial Statement

#000128005819000007 Filed on February 20, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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2017 Q4 Form 10-K Financial Statement

#000128005819000007 Filed on February 20, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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BLACKBAUD INC Stock $blkb