$TRST
TRUSTCO BANK CORP N Y Stock $trst

$trst Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000114036124012641 Filed on March 11, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$59.75M		$226.2M
YoY Change	10.79%		21.22%
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	$1.085M	$1.014M	$4.100M
YoY Change	7.64%	0.4%	0.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$23.18M		$54.36M
YoY Change	232.64%		740.59%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$15.92M	$12.90M	$77.61M
YoY Change	-32.71%	-53.1%	-21.93%
Income Tax	$3.792M	$3.052M	$18.97M
% Of Pretax Income	23.82%	23.66%	24.44%
Net Earnings	$12.13M	$9.848M	$58.65M
YoY Change	-31.67%	-52.9%	-22.05%
Net Earnings / Revenue	20.29%		25.93%
Basic Earnings Per Share	$0.64		$3.08
Diluted Earnings Per Share	$0.64	$0.52	$3.08
COMMON SHARES
Basic Shares Outstanding	19.02M	19.02M	19.02M
Diluted Shares Outstanding	19.03M		19.03M

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$609.7M	$578.0M
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	$73.07M	$74.55M	$74.55M
YoY Change	126.19%	-3.54%	-3.54%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$6.180B	$6.168B	$6.168B
YoY Change	2.21%	2.8%	2.8%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$80.84M	$83.14M	$83.14M
YoY Change	-4.17%	-1.67%	-1.67%
Deferred Revenue
YoY Change
Short-Term Debt	$94.37M	$88.99M	$88.99M
YoY Change	-29.73%	-27.47%	-27.47%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$175.2M	$172.1M	$172.1M
YoY Change	-19.87%	103.57%	103.57%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$0.00	$0.00	$0.00
YoY Change
TOTAL LIABILITIES
Total Short-Term Liabilities	$175.2M	$172.1M	$172.1M
Total Long-Term Liabilities	$0.00	$0.00	$0.00
Total Liabilities	$5.530B	$5.523B	$5.523B
YoY Change	1.83%	2.27%	2.27%
SHAREHOLDERS EQUITY
Retained Earnings	$430.3M	$425.1M
YoY Change	6.33%	7.93%
Common Stock	$277.4M	$277.2M
YoY Change	0.09%	0.04%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$649.2M	$645.3M	$645.3M
YoY Change
Total Liabilities & Shareholders Equity	$6.180B	$6.168B	$6.168B
YoY Change	2.21%	2.8%	2.8%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$12.13M	$9.848M	$58.65M
YoY Change	-31.67%	-52.9%	-22.05%
Depreciation, Depletion And Amortization	$1.085M	$1.014M	$4.100M
YoY Change	7.64%	0.4%	0.0%
Cash From Operating Activities	$9.896M	$17.83M	$64.13M
YoY Change	-47.31%	-21.84%	-18.44%
INVESTING ACTIVITIES
Capital Expenditures	$501.0K	$3.066M	$5.666M
YoY Change	-33.82%	87.52%	49.7%
Acquisitions
YoY Change
Other Investing Activities	$19.36M	-$39.43M	-$227.9M
YoY Change	-134.55%	-64.99%	-44.79%
Cash From Investing Activities	$18.86M	-$42.49M	-$233.6M
YoY Change	-133.21%	-62.81%	-43.93%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	2.927M	95.37M	96.87M
YoY Change	-87.99%	-196.12%	-141.96%
NET CHANGE
Cash From Operating Activities	9.896M	17.83M	64.13M
Cash From Investing Activities	18.86M	-42.49M	-233.6M
Cash From Financing Activities	2.927M	95.37M	96.87M
Net Change In Cash	31.68M	70.71M	-72.60M
YoY Change	-332.68%	-137.08%	-87.24%
FREE CASH FLOW
Cash From Operating Activities	$9.896M	$17.83M	$64.13M
Capital Expenditures	$501.0K	$3.066M	$5.666M
Free Cash Flow	$9.395M	$14.76M	$58.46M
YoY Change	-47.87%	-30.28%	-21.88%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2022	trst	Interest And Dividend Income Securities Us Government Sponsored Enterprises Available For Sale InterestAndDividendIncomeSecuritiesUSGovernmentSponsoredEnterprisesAvailableForSale	1405000
CY2023	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	296000
CY2022	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	343000
CY2021	us-gaap	Interest And Dividend Income Securities Held To Maturity InterestAndDividendIncomeSecuritiesHeldToMaturity	435000
CY2023	trst	Interest Income On Federal Funds Sold And Other Short Term Investments InterestIncomeOnFederalFundsSoldAndOtherShortTermInvestments	26567000
CY2022	trst	Interest Income On Federal Funds Sold And Other Short Term Investments InterestIncomeOnFederalFundsSoldAndOtherShortTermInvestments	14292000
CY2021	trst	Interest Income On Federal Funds Sold And Other Short Term Investments InterestIncomeOnFederalFundsSoldAndOtherShortTermInvestments	1458000
CY2023	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	226206000
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	186602000
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	167982000
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	5727000
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	6665000
CY2023	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	1009000
CY2022	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	740000
CY2021	us-gaap	Interest Expense Short Term Borrowings InterestExpenseShortTermBorrowings	909000
CY2023	us-gaap	Interest Expense InterestExpense	54361000
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	171845000
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	180135000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	160408000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1250000
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-341000
CY2021	us-gaap	Professional Fees ProfessionalFees	6108000
CY2023	trst	Outsourced Services OutsourcedServices	10039000
CY2021	us-gaap	Advertising Expense AdvertisingExpense	1975000
CY2023	trst	Fdic And Other Insurance Expense FDICAndOtherInsuranceExpense	4300000
CY2022	trst	Fdic And Other Insurance Expense FDICAndOtherInsuranceExpense	3159000
CY2021	trst	Fdic And Other Insurance Expense FDICAndOtherInsuranceExpense	3010000
CY2023	trst	Other Real Estate Income Expense Net OtherRealEstateIncomeExpenseNet	524000
CY2022	trst	Other Real Estate Income Expense Net OtherRealEstateIncomeExpenseNet	310000
CY2021	trst	Other Real Estate Income Expense Net OtherRealEstateIncomeExpenseNet	183000
CY2023	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12032000
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	10099000
CY2023	us-gaap	Noninterest Expense NoninterestExpense	111297000
CY2022	us-gaap	Noninterest Expense NoninterestExpense	100319000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	101662000
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	77613000
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	99417000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	82133000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18967000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24183000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20614000
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-7212000
CY2023	trst	Deferred Tax Effect Of Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 DeferredTaxEffectOfChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715	2067000
CY2022	trst	Deferred Tax Effect Of Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 DeferredTaxEffectOfChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715	-2148000
CY2021	trst	Deferred Tax Effect Of Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 DeferredTaxEffectOfChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715	2675000
CY2023	trst	Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 Net ChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715Net	-5888000
CY2022	trst	Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 Net ChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715Net	6118000
CY2021	trst	Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 Net ChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715Net	-7622000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	423000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	674000
CY2023	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	13000
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-313000
CY2021	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	405000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	107000
CY2023Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	49274000
CY2023Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	528730000
CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	607170000
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	578004000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	650599000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	48578000
CY2023Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4954301000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44727000
CY2023Q4	us-gaap	Other Assets OtherAssets	96387000
CY2022Q4	us-gaap	Other Assets OtherAssets	89984000
CY2023Q4	us-gaap	Assets Assets	6168191000
CY2022Q4	us-gaap	Assets Assets	6000052000
CY2023Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	754532000
CY2022Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	838147000
CY2023Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1179241000
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1521473000
CY2023Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	1015213000
CY2022Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	1183321000
CY2023Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	565767000
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	621106000
CY2023Q4	us-gaap	Time Deposits TimeDeposits	1836024000
CY2022Q4	us-gaap	Time Deposits TimeDeposits	1028763000
CY2023Q4	us-gaap	Deposits Deposits	5350777000
CY2022Q4	us-gaap	Deposits Deposits	5192810000
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	30000000
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	30000000
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20058142
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19024433
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	20058000
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	20058000
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	257181000
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	257078000
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	425069000
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	393831000
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-13237000
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-27194000
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	1033709
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	43786000
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	43786000
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	645285000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	599987000
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6168191000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	58646000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	75234000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	61519000
CY2023	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	4114000
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	4101000
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-341000
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-5450000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2156000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-238000
CY2023	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1734000
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2266000
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-3955000
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	103000
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	0
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	0
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CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0
CY2023	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	79000
CY2022	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-4906000
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CY2022	trst	Proceeds From Sales And Calls Of Securities Available For Sale ProceedsFromSalesAndCallsOfSecuritiesAvailableForSale	68954000
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CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	19678000
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	203516000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	139962000
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CY2021	us-gaap	Payments To Acquire Federal Reserve Stock PaymentsToAcquireFederalReserveStock	98000
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CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	578004000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	650599000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1219470000
CY2023	us-gaap	Interest Paid Net InterestPaidNet	51351000
CY2022	us-gaap	Interest Paid Net InterestPaidNet	6028000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	7885000
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	19064000
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	19459000
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	20493000
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	320000
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0000357301
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	NY
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2021Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2021Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.2
CY2023	trst	Period Considered For Reasonable And Supportable Forecast PeriodConsideredForReasonableAndSupportableForecast	P24M
CY2023Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerFairValue	2703000
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CY2023	dei	Auditor Firm AuditorFirmId	173
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CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
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CY2023	dei	Entity File Number EntityFileNumber	0-10592
CY2023	dei	Entity Registrant Name EntityRegistrantName	TRUSTCO BANK CORP NY
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	14-1630287
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CY2023	dei	Trading Symbol TradingSymbol	TRST
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2023	dei	Auditor Name AuditorName	Crowe LLP
CY2023	dei	Auditor Location AuditorLocation	New York, New York
CY2023	dei	Auditor Name AuditorName	Crowe LLP
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CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	162214000
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	159168000
CY2023	trst	Interest And Dividend Income Securities Us Government Sponsored Enterprises Available For Sale InterestAndDividendIncomeSecuritiesUSGovernmentSponsoredEnterprisesAvailableForSale	2805000
CY2021	trst	Interest And Dividend Income Securities Us Government Sponsored Enterprises Available For Sale InterestAndDividendIncomeSecuritiesUSGovernmentSponsoredEnterprisesAvailableForSale	314000
CY2023	trst	Interest And Dividend Income Securities State And Municipal Available For Sale InterestAndDividendIncomeSecuritiesStateAndMunicipalAvailableForSale	2000
CY2022	trst	Interest And Dividend Income Securities State And Municipal Available For Sale InterestAndDividendIncomeSecuritiesStateAndMunicipalAvailableForSale	2000
CY2021	trst	Interest And Dividend Income Securities State And Municipal Available For Sale InterestAndDividendIncomeSecuritiesStateAndMunicipalAvailableForSale	2000
CY2023	trst	Interest And Dividend Income Securities Residential Mortgage Backed Available For Sale InterestAndDividendIncomeSecuritiesResidentialMortgageBackedAvailableForSale	6146000
CY2022	trst	Interest And Dividend Income Securities Residential Mortgage Backed Available For Sale InterestAndDividendIncomeSecuritiesResidentialMortgageBackedAvailableForSale	5677000
CY2021	trst	Interest And Dividend Income Securities Residential Mortgage Backed Available For Sale InterestAndDividendIncomeSecuritiesResidentialMortgageBackedAvailableForSale	4515000
CY2023	trst	Interest And Dividend Income Securities Corporate Debt Operating Available For Sale Securities InterestAndDividendIncomeSecuritiesCorporateDebtOperatingAvailableForSaleSecurities	1987000
CY2022	trst	Interest And Dividend Income Securities Corporate Debt Operating Available For Sale Securities InterestAndDividendIncomeSecuritiesCorporateDebtOperatingAvailableForSaleSecurities	1804000
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CY2023	trst	Interest And Dividend Income Sba Guaranteed Participation Securities Available For Sale InterestAndDividendIncomeSBAGuaranteedParticipationSecuritiesAvailableForSale	437000
CY2022	trst	Interest And Dividend Income Sba Guaranteed Participation Securities Available For Sale InterestAndDividendIncomeSBAGuaranteedParticipationSecuritiesAvailableForSale	551000
CY2021	trst	Interest And Dividend Income Sba Guaranteed Participation Securities Available For Sale InterestAndDividendIncomeSBAGuaranteedParticipationSecuritiesAvailableForSale	745000
CY2023	trst	Interest And Dividend Income Other Available For Sale Securities InterestAndDividendIncomeOtherAvailableForSaleSecurities	10000
CY2022	trst	Interest And Dividend Income Other Available For Sale Securities InterestAndDividendIncomeOtherAvailableForSaleSecurities	9000
CY2021	trst	Interest And Dividend Income Other Available For Sale Securities InterestAndDividendIncomeOtherAvailableForSaleSecurities	20000
CY2023	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	11387000
CY2022	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	9448000
CY2021	us-gaap	Interest Income Debt Securities Available For Sale Operating InterestIncomeDebtSecuritiesAvailableForSaleOperating	6661000
CY2023	trst	Interest And Dividend Income Securities Residential Mortgage Backed Held To Maturity InterestAndDividendIncomeSecuritiesResidentialMortgageBackedHeldToMaturity	296000
CY2022	trst	Interest And Dividend Income Securities Residential Mortgage Backed Held To Maturity InterestAndDividendIncomeSecuritiesResidentialMortgageBackedHeldToMaturity	343000
CY2021	trst	Interest And Dividend Income Securities Residential Mortgage Backed Held To Maturity InterestAndDividendIncomeSecuritiesResidentialMortgageBackedHeldToMaturity	435000
CY2023	trst	Dividends Income Federal Home Loan Bank Stock DividendsIncomeFederalHomeLoanBankStock	500000
CY2022	trst	Dividends Income Federal Home Loan Bank Stock DividendsIncomeFederalHomeLoanBankStock	305000
CY2021	trst	Dividends Income Federal Home Loan Bank Stock DividendsIncomeFederalHomeLoanBankStock	260000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	53352000
CY2022	us-gaap	Interest Expense InterestExpense	6467000
CY2021	us-gaap	Interest Expense InterestExpense	7574000
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-5450000
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	170595000
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	180476000
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	165858000
CY2023	trst	Financial Services Income FinancialServicesIncome	6425000
CY2022	trst	Financial Services Income FinancialServicesIncome	7037000
CY2021	trst	Financial Services Income FinancialServicesIncome	7358000
CY2023	trst	Fees For Services To Customers FeesForServicesToCustomers	10648000
CY2022	trst	Fees For Services To Customers FeesForServicesToCustomers	10947000
CY2021	trst	Fees For Services To Customers FeesForServicesToCustomers	9799000
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CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	1276000
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CY2022	us-gaap	Noninterest Income NoninterestIncome	19260000
CY2021	us-gaap	Noninterest Income NoninterestIncome	17937000
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CY2022	us-gaap	Equipment Expense EquipmentExpense	6487000
CY2021	us-gaap	Equipment Expense EquipmentExpense	6617000
CY2023	us-gaap	Professional Fees ProfessionalFees	6245000
CY2022	us-gaap	Professional Fees ProfessionalFees	5577000
CY2022	trst	Outsourced Services OutsourcedServices	9210000
CY2021	trst	Outsourced Services OutsourcedServices	8384000
CY2023	us-gaap	Advertising Expense AdvertisingExpense	1878000
CY2022	us-gaap	Advertising Expense AdvertisingExpense	2046000
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8922000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	58646000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	75234000
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CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.08
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CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	11293000
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CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	2921000
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CY2023	trst	Other Comprehensive Income Change In Obligation Pension And Other Postretirement Benefits Before Tax OtherComprehensiveIncomeChangeInObligationPensionAndOtherPostretirementBenefitsBeforeTax	-7955000
CY2022	trst	Other Comprehensive Income Change In Obligation Pension And Other Postretirement Benefits Before Tax OtherComprehensiveIncomeChangeInObligationPensionAndOtherPostretirementBenefitsBeforeTax	8266000
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CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	70000
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CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	199000
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CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-39341000
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CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35893000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	61730000
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	43429000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	452289000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	481513000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6396000
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7580000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6458000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7707000
CY2023Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	6203000
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	5797000
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CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32556000
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CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	122700000
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CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	48980000
CY2023Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	38668000
CY2022Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	35575000
CY2023Q4	us-gaap	Liabilities Liabilities	5522906000
CY2022Q4	us-gaap	Liabilities Liabilities	5400065000
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20058142
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19024433
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	1033709
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6000052000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	568161000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	61519000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	211000
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CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	9923
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	260000
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CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	71260
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2386000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	601128000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	75234000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-39341000
CY2022	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	12458
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	429000
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.41
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	26989000
CY2022	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	208014
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	7004000
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	599987000
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CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	13957000
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.44
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	27408000
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	103000
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	645285000
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	4219000
CY2023	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	6672000
CY2022	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	6452000
CY2021	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	6383000
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	355000
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	122000
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	216000
CY2023	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	143000
CY2022	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	68000
CY2021	us-gaap	Impairment Of Real Estate ImpairmentOfRealEstate	121000
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1250000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4114000
CY2021	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	148000
CY2023	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2192000
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2393000
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-932000
CY2023	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	3010000
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	439000
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-311000
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	5588000
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	8432000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	10247000
CY2023	trst	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-6996000
CY2022	trst	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-6829000
CY2021	trst	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-6652000
CY2023	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	1410000
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-522000
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	1498000
CY2023	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	5483000
CY2022	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	3392000
CY2021	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-6154000
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	64129000
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	78626000
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	588000
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	764000
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	470000
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	6000
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5666000
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3785000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2840000
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-233593000
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-416626000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-175256000
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	230936000
CY2023	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-33710000
CY2022	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-121986000
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	260000
CY2023	trst	Payment For Settle Fractional Shares In Reverse Stock Split PaymentForSettleFractionalSharesInReverseStockSplit	0
CY2022	trst	Payment For Settle Fractional Shares In Reverse Stock Split PaymentForSettleFractionalSharesInReverseStockSplit	0
CY2021	trst	Payment For Settle Fractional Shares In Reverse Stock Split PaymentForSettleFractionalSharesInReverseStockSplit	200000
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7004000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2386000
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	27388000
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	26991000
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	26279000
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	96869000
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-230871000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	232262000
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-72595000
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-568871000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	112371000
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	650599000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1219470000
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	2233000
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	490000
CY2023	trst	Increase Decrease In Dividends Payable IncreaseDecreaseInDividendsPayable	20000
CY2022	trst	Increase Decrease In Dividends Payable IncreaseDecreaseInDividendsPayable	-2000
CY2021	trst	Increase Decrease In Dividends Payable IncreaseDecreaseInDividendsPayable	158000
CY2023Q4	us-gaap	Debt Securities Available For Sale Accumulated Gross Unrealized Gain Loss Before Tax DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax	11293000
CY2022Q4	us-gaap	Debt Securities Available For Sale Accumulated Gross Unrealized Gain Loss Before Tax DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax	-43513000
CY2021Q4	us-gaap	Debt Securities Available For Sale Accumulated Gross Unrealized Gain Loss Before Tax DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax	-9715000
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-2921000
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	11268000
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2503000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-410000
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-1321000
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	-269000
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	107000
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	343000
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	70000
CY2023	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-7955000
CY2022	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	8266000
CY2021	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-10297000
CY2023	trst	Deferred Tax Effect Of Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 DeferredTaxEffectOfChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715	2067000
CY2022	trst	Deferred Tax Effect Of Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 DeferredTaxEffectOfChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715	-2148000
CY2021	trst	Deferred Tax Effect Of Change In Overfunded Portion Of Pension And Post Retirement Benefit Plans Asc715 DeferredTaxEffectOfChangeInOverfundedPortionOfPensionAndPostRetirementBenefitPlansAsc715	2675000
CY2021Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="display:none;"><br/></div> <div style="font-family: 'Times New Roman'; font-size: 10pt; font-weight: bold; text-indent: -9pt; margin-left: 9pt;">Use of Estimates</div> <div style="font-family: 'Times New Roman'; font-size: 10pt;"><br/> </div> <div style="display:none;"><br/></div> <div style="text-align: left; text-indent: 27pt; font-family: 'Times New Roman'; font-size: 10pt;">The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</div>
CY2023	trst	Nonpayment Period Of Loans Moved To Nonaccrual Status Debt Securities NonpaymentPeriodOfLoansMovedToNonaccrualStatusDebtSecurities	P90D
CY2023Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0
CY2023	trst	Nonpayment Period Of Loans Moved To Nonaccrual Status NonpaymentPeriodOfLoansMovedToNonaccrualStatus	P90D
CY2023Q4	us-gaap	Financing Receivable Threshold Period Past Due Writeoff FinancingReceivableThresholdPeriodPastDueWriteoff	P180D
CY2023	trst	Non Payment Period Of Nonaccrual Loans For Individual Assessment NonPaymentPeriodOfNonaccrualLoansForIndividualAssessment	P180D
CY2023	trst	Deferral Period Of Past Due Loans DeferralPeriodOfPastDueLoans	P60M
CY2023Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	194000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2100000
CY2023	trst	Age At Which Company Provides Access To Medicare Supplemental Program For Retirees AgeAtWhichCompanyProvidesAccessToMedicareSupplementalProgramForRetirees	P65Y
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1
CY2023Q4	trst	Federal Reserve Bank Reserve Requirement FederalReserveBankReserveRequirement	0
CY2022Q4	trst	Federal Reserve Bank Reserve Requirement FederalReserveBankReserveRequirement	0
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	484513000
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	286000
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	32510000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	452289000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	525030000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	35000
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	43552000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	481513000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	70701000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	70059000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	131890000
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	127367000
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	484513000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	452289000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	0
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	439923000
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	32510000
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	439923000
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	32510000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	276277000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	16767000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	197631000
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	26785000
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	473908000
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	43552000
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0
CY2023	trst	Proceeds From Calls Paydowns Of Available For Sale Securities ProceedsFromCallsPaydownsOfAvailableForSaleSecurities	53503000
CY2022	trst	Proceeds From Calls Paydowns Of Available For Sale Securities ProceedsFromCallsPaydownsOfAvailableForSaleSecurities	68954000
CY2021	trst	Proceeds From Calls Paydowns Of Available For Sale Securities ProceedsFromCallsPaydownsOfAvailableForSaleSecurities	148609000
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	5008000
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	15057000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	9162000
CY2023	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0
CY2023Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	155300000
CY2022Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	171400000
CY2023Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6458000
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	74000
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	136000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6396000
CY2022Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	7707000
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	90000
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	217000
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7580000
CY2023Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6458000
CY2023Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6396000
CY2023Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsFairValue	283000
CY2023Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsAccumulatedLoss	3000
CY2023Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerAccumulatedLoss	133000
CY2023Q4	trst	Debt Securities Held To Maturity Unrealized Loss Position Fair Value DebtSecuritiesHeldToMaturityUnrealizedLossPositionFairValue	2986000
CY2023Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	136000
CY2022Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsFairValue	3327000
CY2022Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions Less Than12 Months Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositionsLessThan12MonthsAccumulatedLoss	206000
CY2022Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Fair Value DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerFairValue	258000
CY2022Q4	trst	Debt Securities Held To Maturity Continuous Unrealized Loss Positions12 Months Or Longer Accumulated Loss DebtSecuritiesHeldToMaturityContinuousUnrealizedLossPositions12MonthsOrLongerAccumulatedLoss	11000
CY2022Q4	trst	Debt Securities Held To Maturity Unrealized Loss Position Fair Value DebtSecuritiesHeldToMaturityUnrealizedLossPositionFairValue	3585000
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	217000
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0
CY2023Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss DebtSecuritiesHeldToMaturityAllowanceForCreditLoss	0
CY2022Q4	us-gaap	Debt Securities Held To Maturity Nonaccrual DebtSecuritiesHeldToMaturityNonaccrual	0
CY2023Q4	us-gaap	Debt Securities Held To Maturity Nonaccrual DebtSecuritiesHeldToMaturityNonaccrual	0
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	5002879000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	48578000
CY2023Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4954301000
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4733201000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	46032000
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	4687169000
CY2023Q4	us-gaap	Other Receivables OtherReceivables	29300000
CY2022Q4	us-gaap	Other Receivables OtherReceivables	20500000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	16000000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	7200000
CY2023	us-gaap	Loans And Leases Receivable Related Parties Period Increase Decrease LoansAndLeasesReceivableRelatedPartiesPeriodIncreaseDecrease	0
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	46032000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	547000
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	593000
CY2023	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	-46000
CY2023	trst	Financing Receivable Credit Loss Expense Reversal Gross FinancingReceivableCreditLossExpenseReversalGross	2500000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	48578000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44267000
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	152000
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	464000
CY2022	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	-312000
CY2022	trst	Financing Receivable Credit Loss Expense Reversal Gross FinancingReceivableCreditLossExpenseReversalGross	-900000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	46032000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	49595000
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	430000
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	552000
CY2021	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	-122000
CY2021	trst	Financing Receivable Credit Loss Expense Reversal Gross FinancingReceivableCreditLossExpenseReversalGross	-5450000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	44267000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	0
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	48578000
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	48578000
CY2023Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	24729000
CY2023Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4978150000
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	5002879000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	0
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	46032000
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	46032000
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	25695000
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	4707506000
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	4733201000
CY2023Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	5002879000
CY2022Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	4733201000
CY2023	trst	Number Of Days Past Due NumberOfDaysPastDue	P90D
CY2022	trst	Number Of Days Past Due NumberOfDaysPastDue	P90D
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2023Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2023Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	194000
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2100000
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	17663000
CY2023Q4	trst	Other Real Estate Mortgage Loans OtherRealEstateMortgageLoans	3000
CY2023Q4	trst	Financing Receivable Recorded Investment Nonaccrual Status And Other Nonperforming Real Estate Mortgages FinancingReceivableRecordedInvestmentNonaccrualStatusAndOtherNonperformingRealEstateMortgages	17666000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	17483000
CY2022Q4	trst	Other Real Estate Mortgage Loans OtherRealEstateMortgageLoans	10000
CY2022Q4	trst	Financing Receivable Recorded Investment Nonaccrual Status And Other Nonperforming Real Estate Mortgages FinancingReceivableRecordedInvestmentNonaccrualStatusAndOtherNonperformingRealEstateMortgages	17493000
CY2023Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	16244000
CY2023Q4	trst	Financing Receivable Nonaccrual With Allowance For Credit Loss FinancingReceivableNonaccrualWithAllowanceForCreditLoss	1419000
CY2023Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	16150000
CY2022Q4	trst	Financing Receivable Nonaccrual With Allowance For Credit Loss FinancingReceivableNonaccrualWithAllowanceForCreditLoss	1333000
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0
CY2023Q4	trst	Financing Receivable Nonaccrual With Allowance For Credit Loss FinancingReceivableNonaccrualWithAllowanceForCreditLoss	1400000
CY2022Q4	trst	Financing Receivable Nonaccrual With Allowance For Credit Loss FinancingReceivableNonaccrualWithAllowanceForCreditLoss	1300000
CY2023Q4	trst	Tdr S Classifications From Previously Performing Loans TdrSClassificationsFromPreviouslyPerformingLoans	8300000
CY2022Q4	trst	Tdr S Classifications From Previously Performing Loans TdrSClassificationsFromPreviouslyPerformingLoans	9200000
CY2023	us-gaap	Financing Receivable Modification To Total Financing Receivables Percent FinancingReceivableModificationToTotalFinancingReceivablesPercent	0.0003
CY2023Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	1283000
CY2023Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0
CY2023	trst	Financing Receivable Modified Allowance For Credit Loss Write Off FinancingReceivableModifiedAllowanceForCreditLossWriteOff	0
CY2023Q4	trst	Financing Receivable Modified Allowance For Credit Losses FinancingReceivableModifiedAllowanceForCreditLosses	0
CY2023	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	138110000
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	133866000
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	104104000
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	101310000
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	34007000
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	32556000
CY2023	us-gaap	Depreciation Depreciation	4100000
CY2022	us-gaap	Depreciation Depreciation	4100000
CY2021	us-gaap	Depreciation Depreciation	4200000
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	8200000
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	8200000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	8100000
CY2023	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	382000
CY2022	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	190000
CY2021	us-gaap	Interest Expense Negotiable Order Of Withdrawal Now Deposits InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits	178000
CY2023	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	2531000
CY2022	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	920000
CY2021	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	624000
CY2023	trst	Interest Expense Money Market Deposits And Time Deposits InterestExpenseMoneyMarketDepositsAndTimeDeposits	50439000
CY2022	trst	Interest Expense Money Market Deposits And Time Deposits InterestExpenseMoneyMarketDepositsAndTimeDeposits	4617000
CY2021	trst	Interest Expense Money Market Deposits And Time Deposits InterestExpenseMoneyMarketDepositsAndTimeDeposits	5863000
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	53352000
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	5727000
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	6665000
CY2023Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1715122000
CY2023Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	26971000
CY2023Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	1122000
CY2023Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	91716000
CY2023Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	1061000
CY2023Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	32000
CY2023Q4	us-gaap	Time Deposits TimeDeposits	1836024000
CY2023Q4	trst	Amount Included In Time Deposits With Balance In250000 Or More AmountIncludedInTimeDepositsWithBalanceIn250000OrMore	474400000
CY2022Q4	trst	Amount Included In Time Deposits With Balance In250000 Or More AmountIncludedInTimeDepositsWithBalanceIn250000OrMore	250000000
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15224000
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17136000
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17657000
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1587000
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2933000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3195000
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	16811000
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	20069000
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	20852000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2156000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4114000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-238000
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	18967000
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	24183000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20614000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.009
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.244
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.243
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	9490000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	8478000
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	12995000
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	12424000
CY2023Q4	trst	Other Income Or Expense Not Yet Reported For Tax Purposes OtherIncomeOrExpenseNotYetReportedForTaxPurposes	-1188000
CY2022Q4	trst	Other Income Or Expense Not Yet Reported For Tax Purposes OtherIncomeOrExpenseNotYetReportedForTaxPurposes	420000
CY2023Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	2496000
CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	2389000
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	179000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1977000
CY2023Q4	trst	Adjustments On Measurement Of Credit Losses On Financial Instruments Due To Adoption Of New Accounting Pronouncement AdjustmentsOnMeasurementOfCreditLossesOnFinancialInstrumentsDueToAdoptionOfNewAccountingPronouncement	0
CY2022Q4	trst	Adjustments On Measurement Of Credit Losses On Financial Instruments Due To Adoption Of New Accounting Pronouncement AdjustmentsOnMeasurementOfCreditLossesOnFinancialInstrumentsDueToAdoptionOfNewAccountingPronouncement	1218000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1977000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4873000
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2156000
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4114000
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	179000
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2000000
CY2023Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	8400000
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	11300000
CY2023Q4	trst	Deferred Tax Liability Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxLiabilityTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	3700000
CY2022Q4	trst	Deferred Tax Liability Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxLiabilityTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	1800000
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.031
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.03
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.251
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0
CY2023	trst	Other Comprehensive Income Loss Defined Benefit Plan Change In Overfunded Position Before Tax OtherComprehensiveIncomeLossDefinedBenefitPlanChangeInOverfundedPositionBeforeTax	-7955000
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	423000
CY2023	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	13000
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-7545000
CY2022	trst	Other Comprehensive Income Loss Defined Benefit Plan Change In Overfunded Position Before Tax OtherComprehensiveIncomeLossDefinedBenefitPlanChangeInOverfundedPositionBeforeTax	8266000
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Cost Credit Arising During Period Before Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostCreditArisingDuringPeriodBeforeTax	0
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	1008000
CY2022	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Before Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax	-313000
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	9587000
CY2023	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0
CY2022	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	0
CY2023	trst	Performance Bonus Units Awards Related To Change Of Control PerformanceBonusUnitsAwardsRelatedToChangeOfControl	291000
CY2023	us-gaap	Option Indexed To Issuers Equity Strike Price1 OptionIndexedToIssuersEquityStrikePrice1	44.37
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	1700000
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y10M24D
CY2023	us-gaap	Litigation Settlement Amount Awarded To Other Party LitigationSettlementAmountAwardedToOtherParty	2750000
CY2023	trst	Outsourced Services OutsourcedServices	10000000
CY2022	trst	Outsourced Services OutsourcedServices	9200000
CY2021	trst	Outsourced Services OutsourcedServices	8400000
CY2023	us-gaap	Net Income Loss NetIncomeLoss	58646000
CY2022	us-gaap	Net Income Loss NetIncomeLoss	75234000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	61519000
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19024000
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19131000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19259000
CY2023	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2000
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4000
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19025000
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19133000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	19263000
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.08
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.93
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.19
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.08
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.93
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.19
CY2023	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	143000
CY2023Q4	trst	Impaired Loans Net Of Allowance Fair Value Disclosure ImpairedLoansNetOfAllowanceFairValueDisclosure	24700000
CY2023Q4	trst	Collateral Dependent Impaired Financing Receivable Recorded Investment CollateralDependentImpairedFinancingReceivableRecordedInvestment	0
CY2023Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	0
CY2023	trst	Gross Charge Offs Residential Impaired Loans GrossChargeOffsResidentialImpairedLoans	0
CY2022	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	68000
CY2022Q4	trst	Impaired Loans Net Of Allowance Fair Value Disclosure ImpairedLoansNetOfAllowanceFairValueDisclosure	25700000
CY2022Q4	trst	Collateral Dependent Impaired Financing Receivable Recorded Investment CollateralDependentImpairedFinancingReceivableRecordedInvestment	0
CY2022Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	0
CY2022	trst	Gross Charge Offs Residential Impaired Loans GrossChargeOffsResidentialImpairedLoans	0
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	578004000
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	452289000
CY2023Q4	trst	Debt Securities Held To Maturity Fair Value Disclosure DebtSecuritiesHeldToMaturityFairValueDisclosure	6396000
CY2023Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4422027000
CY2023Q4	trst	Interest Receivable Fair Value Disclosure InterestReceivableFairValueDisclosure	13683000
CY2023Q4	trst	Demand Deposit Accounts Fair Value Disclosure DemandDepositAccountsFairValueDisclosure	754532000
CY2023Q4	trst	Interest Bearing Deposit Fair Value Disclosure InterestBearingDepositFairValueDisclosure	4580010000
CY2023Q4	us-gaap	Shortterm Debt Fair Value ShorttermDebtFairValue	88990000
CY2023Q4	trst	Interest Payable Fair Value Disclosure InterestPayableFairValueDisclosure	3612000
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	650599000
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	481513000
CY2022Q4	trst	Debt Securities Held To Maturity Fair Value Disclosure DebtSecuritiesHeldToMaturityFairValueDisclosure	7580000
CY2022Q4	us-gaap	Loans Receivable Fair Value Disclosure LoansReceivableFairValueDisclosure	4328508000
CY2022Q4	trst	Interest Receivable Fair Value Disclosure InterestReceivableFairValueDisclosure	11492000
CY2022Q4	trst	Demand Deposit Accounts Fair Value Disclosure DemandDepositAccountsFairValueDisclosure	838147000
CY2022Q4	trst	Interest Bearing Deposit Fair Value Disclosure InterestBearingDepositFairValueDisclosure	4338428000
CY2022Q4	us-gaap	Shortterm Debt Fair Value ShorttermDebtFairValue	122700000
CY2022Q4	trst	Interest Payable Fair Value Disclosure InterestPayableFairValueDisclosure	602000
CY2023	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	14260000
CY2023	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	303000
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	13957000
CY2022	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-38363000
CY2022	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	978000
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-39341000
CY2021	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	410000
CY2021	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	199000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	211000
CY2023	trst	Other Non Interest Income OtherNonInterestIncome	1022000
CY2022	trst	Other Non Interest Income OtherNonInterestIncome	1123000
CY2021	trst	Other Non Interest Income OtherNonInterestIncome	698000
CY2023	us-gaap	Noninterest Income NoninterestIncome	18315000
CY2022	us-gaap	Noninterest Income NoninterestIncome	19260000
CY2021	us-gaap	Noninterest Income NoninterestIncome	17937000
CY2023Q4	trst	Number Of Leases For Which Construction Not Started NumberOfLeasesForWhichConstructionNotStarted	0
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y6M
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	8165000
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	8213000
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	8128000
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	2226000
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	2183000
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	2015000
CY2023	us-gaap	Lease Cost LeaseCost	10391000
CY2022	us-gaap	Lease Cost LeaseCost	10396000
CY2021	us-gaap	Lease Cost LeaseCost	10143000
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	8393000
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	8327000
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	8192000
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2487000
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3089000
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6588000
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y6M
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y10M24D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y3M18D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.03
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.03
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	8479000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	8078000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	7104000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	5867000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4679000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	16485000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	50692000
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	6221000
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	44471000
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	40500000
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44700000

Files In Submission

Name	View Source	Status
0001140361-24-012641-index-headers.html	Edgar Link	pending
0001140361-24-012641-index.html	Edgar Link	pending
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TRUSTCO BANK CORP N Y Stock $trst

2024 Q1 Form 10-K Financial Statement

#000114036124012641 Filed on March 11, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TRST TRUSTCO BANK CORP N Y Stock $trst

2024 Q1 Form 10-K Financial Statement

#000114036124012641 Filed on March 11, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TRST
TRUSTCO BANK CORP N Y Stock $trst