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This item excludes interest income earned on credit card balances and transactions.No authoritative reference available.falsefalseBank card fees20false0us-gaap_FeesAndCommissionsFiduciaryAndTrustActivitiesus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse1186800011868falsefalsefalsefalsefalse2truefalsefalse1198400011984falsefalsefalsefalsefalse3truefalsefalse1294800012948falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryIncome from services rendered by trust departments or by any consolidated subsidiaries acting in a fiduciary capacity, including fees earned for (1) acting as an agent for fiduciary placement and loans and (2) custody or investment advisory services when such fees are not separately billed to the customer. This item excludes commissions and fees received for the accumulation or disbursement of funds deposited to Individual Retirement or Keogh plan accounts when such are not handled by the reporting entity's trust department.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 falsefalseTrust service fees21false0us-gaap_FeesAndCommissionsMortgageBankingus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse98490009849falsefalsefalsefalsefalse2truefalsefalse94060009406falsefalsefalsefalsefalse3truefalsefalse48990004899falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe noninterest income derived from mortgage banking activities (fees and commissions), excluding fees earned from servicing third-party assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 falsefalseSecondary mortgage market operations22false0us-gaap_NoninterestIncomeOtherOperatingIncomeus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3993500039935falsefalsefalsefalsefalse2truefalsefalse4064100040641falsefalsefalsefalsefalse3truefalsefalse3753800037538falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryRepresents other forms of revenue earned, excluding interest, which is not otherwise specified in the taxonomy.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 falsefalseOther noninterest income23false0us-gaap_PrincipalTransactionsRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse00falsefalsefalsefalsefalse2truefalsefalse334000334falsefalsefalsefalsefalse3truefalsefalse6700067falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe caption reflecting the net gain or loss, both realized and unrealized, arising from Principal Trading and Principal Investments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-8, 12 -IssueDate 2006-05-01 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 9, 51, 57 -IssueDate 2006-05-01 falsefalseSecurities transactions24false0us-gaap_NoninterestIncomeus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsetotallabel1truefalsefalse120506000120506falsefalsefalsefalsefalse2truefalsefalse119950000119950falsefalsefalsefalsefalse3truefalsefalse107172000107172falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Chapter V -Section 563c.102 -Paragraph 13 -Subsection II Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 truefalseTotal noninterest income25true0us-gaap_NoninterestExpenseAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseNONINTEREST EXPENSE26false0us-gaap_SalariesAndWagesus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse163211000163211falsefalsefalsefalsefalse2truefalsefalse158116000158116falsefalsefalsefalsefalse3truefalsefalse150614000150614falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryExpenditures for salaries other than officers. 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occupancy30false0us-gaap_InformationTechnologyAndDataProcessingus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2902900029029falsefalsefalsefalsefalse2truefalsefalse2577000025770falsefalsefalsefalsefalse3truefalsefalse2503500025035falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of expenses incurred in the period for information technology and data processing products and services.No authoritative reference available.falsefalseEquipment and data processing31false0wtny_LegalAndOtherProfessionalServiceswtnyfalsedebitdurationThe amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to...falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse3419000034190falsefalsefalsefalsefalse2truefalsefalse1955600019556falsefalsefalsefalsefalse3truefalsefalse1361200013612falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings and the amount of fees charged for services from other professionals such as doctors, lawyers and accountants.No authoritative reference available.falsefalseLegal and other professional services32false0us-gaap_FederalDepositInsuranceCorporationPremiumExpenseus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse2341200023412falsefalsefalsefalsefalse2truefalsefalse2426000024260falsefalsefalsefalsefalse3truefalsefalse53730005373falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe premium paid to the Federal Deposit Insurance Corporation for deposit insurance which is included in noninterest expense.No authoritative reference available.falsefalseDeposit insurance and regulatory 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Includes Louisiana corporate value taxes.No authoritative reference available.falsefalseCorporate value and franchise taxes35false0us-gaap_AmortizationOfIntangibleAssetsus-gaaptruedebitdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse51940005194falsefalsefalsefalsefalse2truefalsefalse87670008767falsefalsefalsefalsefalse3truefalsefalse77850007785falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryThe aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. 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