3.10.0.1 html 235 254 1 false 51 0 false 4 false false R1.htm 1001 - Document - Document And Entity Information Sheet http://www.wellesleybank.com/role/DocumentAndEntityInformation Document And Entity Information Cover 1 false false R2.htm 1002 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.wellesleybank.com/role/ConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 1003 - Statement - CONSOLIDATED BALANCE SHEETS [Parenthetical] Sheet http://www.wellesleybank.com/role/ConsolidatedBalanceSheetsParenthetical CONSOLIDATED BALANCE SHEETS [Parenthetical] Statements 3 false false R4.htm 1004 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Sheet http://www.wellesleybank.com/role/ConsolidatedStatementsOfComprehensiveIncome CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statements 4 false false R5.htm 1005 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Sheet http://www.wellesleybank.com/role/ConsolidatedStatementsOfChangesInStockholdersEquity CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statements 5 false false R6.htm 1006 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY [Parenthetical] Sheet http://www.wellesleybank.com/role/ConsolidatedStatementsOfChangesInStockholdersEquityParenthetical CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY [Parenthetical] Statements 6 false false R7.htm 1007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.wellesleybank.com/role/ConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 7 false false R8.htm 1008 - Disclosure - BASIS OF PRESENTATION AND CONSOLIDATION Sheet http://www.wellesleybank.com/role/BasisOfPresentationAndConsolidation BASIS OF PRESENTATION AND CONSOLIDATION Notes 8 false false R9.htm 1009 - Disclosure - LOAN POLICIES Sheet http://www.wellesleybank.com/role/LoanPolicies LOAN POLICIES Notes 9 false false R10.htm 1010 - Disclosure - COMPREHENSIVE INCOME Sheet http://www.wellesleybank.com/role/ComprehensiveIncome COMPREHENSIVE INCOME Notes 10 false false R11.htm 1011 - Disclosure - RECENT ACCOUNTING AND REGULATORY PRONOUNCEMENTS Sheet http://www.wellesleybank.com/role/RecentAccountingAndRegulatoryPronouncements RECENT ACCOUNTING AND REGULATORY PRONOUNCEMENTS Notes 11 false false R12.htm 1012 - Disclosure - SECURITIES AVAILABLE FOR SALE Sheet http://www.wellesleybank.com/role/SecuritiesAvailableForSale SECURITIES AVAILABLE FOR SALE Notes 12 false false R13.htm 1013 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLosses LOANS AND ALLOWANCE FOR LOAN LOSSES Notes 13 false false R14.htm 1014 - Disclosure - FAIR VALUES OF FINANCIAL INSTRUMENTS Sheet http://www.wellesleybank.com/role/FairValuesOfFinancialInstruments FAIR VALUES OF FINANCIAL INSTRUMENTS Notes 14 false false R15.htm 1015 - Disclosure - EMPLOYEE STOCK OWNERSHIP PLAN Sheet http://www.wellesleybank.com/role/EmployeeStockOwnershipPlan EMPLOYEE STOCK OWNERSHIP PLAN Notes 15 false false R16.htm 1016 - Disclosure - EQUITY INCENTIVE PLANS Sheet http://www.wellesleybank.com/role/EquityIncentivePlans EQUITY INCENTIVE PLANS Notes 16 false false R17.htm 1017 - Disclosure - EARNINGS PER COMMON SHARE Sheet http://www.wellesleybank.com/role/EarningsPerCommonShare EARNINGS PER COMMON SHARE Notes 17 false false R18.htm 1018 - Disclosure - LOAN POLICIES (Policies) Sheet http://www.wellesleybank.com/role/LoanPoliciesPolicies LOAN POLICIES (Policies) Policies 18 false false R19.htm 1019 - Disclosure - COMPREHENSIVE INCOME (Tables) Sheet http://www.wellesleybank.com/role/ComprehensiveIncomeTables COMPREHENSIVE INCOME (Tables) Tables http://www.wellesleybank.com/role/ComprehensiveIncome 19 false false R20.htm 1020 - Disclosure - SECURITIES AVAILABLE FOR SALE (Tables) Sheet http://www.wellesleybank.com/role/SecuritiesAvailableForSaleTables SECURITIES AVAILABLE FOR SALE (Tables) Tables http://www.wellesleybank.com/role/SecuritiesAvailableForSale 20 false false R21.htm 1021 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables) Tables http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLosses 21 false false R22.htm 1022 - Disclosure - FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables) Sheet http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsTables FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables) Tables http://www.wellesleybank.com/role/FairValuesOfFinancialInstruments 22 false false R23.htm 1023 - Disclosure - EMPLOYEE STOCK OWNERSHIP PLAN (Tables) Sheet http://www.wellesleybank.com/role/EmployeeStockOwnershipPlanTables EMPLOYEE STOCK OWNERSHIP PLAN (Tables) Tables http://www.wellesleybank.com/role/EmployeeStockOwnershipPlan 23 false false R24.htm 1024 - Disclosure - EQUITY INCENTIVE PLANS (Tables) Sheet http://www.wellesleybank.com/role/EquityIncentivePlansTables EQUITY INCENTIVE PLANS (Tables) Tables http://www.wellesleybank.com/role/EquityIncentivePlans 24 false false R25.htm 1025 - Disclosure - EARNINGS PER COMMON SHARE (Tables) Sheet http://www.wellesleybank.com/role/EarningsPerCommonShareTables EARNINGS PER COMMON SHARE (Tables) Tables http://www.wellesleybank.com/role/EarningsPerCommonShare 25 false false R26.htm 1026 - Disclosure - LOAN POLICIES (Details Textual) Sheet http://www.wellesleybank.com/role/LoanPoliciesDetailsTextual LOAN POLICIES (Details Textual) Details http://www.wellesleybank.com/role/LoanPoliciesPolicies 26 false false R27.htm 1027 - Disclosure - COMPREHENSIVE INCOME (Details) Sheet http://www.wellesleybank.com/role/ComprehensiveIncomeDetails COMPREHENSIVE INCOME (Details) Details http://www.wellesleybank.com/role/ComprehensiveIncomeTables 27 false false R28.htm 1028 - Disclosure - RECENT ACCOUNTING AND REGULATORY PRONOUNCEMENTS (Details Textual) Sheet http://www.wellesleybank.com/role/RecentAccountingAndRegulatoryPronouncementsDetailsTextual RECENT ACCOUNTING AND REGULATORY PRONOUNCEMENTS (Details Textual) Details http://www.wellesleybank.com/role/RecentAccountingAndRegulatoryPronouncements 28 false false R29.htm 1029 - Disclosure - SECURITIES AVAILABLE FOR SALE (Details) Sheet http://www.wellesleybank.com/role/SecuritiesAvailableForSaleDetails SECURITIES AVAILABLE FOR SALE (Details) Details http://www.wellesleybank.com/role/SecuritiesAvailableForSaleTables 29 false false R30.htm 1030 - Disclosure - SECURITIES AVAILABLE FOR SALE (Details 1) Sheet http://www.wellesleybank.com/role/SecuritiesAvailableForSaleDetails1 SECURITIES AVAILABLE FOR SALE (Details 1) Details http://www.wellesleybank.com/role/SecuritiesAvailableForSaleTables 30 false false R31.htm 1031 - Disclosure - SECURITIES AVAILABLE FOR SALE (Details 2) Sheet http://www.wellesleybank.com/role/SecuritiesAvailableForSaleDetails2 SECURITIES AVAILABLE FOR SALE (Details 2) Details http://www.wellesleybank.com/role/SecuritiesAvailableForSaleTables 31 false false R32.htm 1032 - Disclosure - SECURITIES AVAILABLE FOR SALE (Details Textual) Sheet http://www.wellesleybank.com/role/SecuritiesAvailableForSaleDetailsTextual SECURITIES AVAILABLE FOR SALE (Details Textual) Details http://www.wellesleybank.com/role/SecuritiesAvailableForSaleTables 32 false false R33.htm 1033 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails LOANS AND ALLOWANCE FOR LOAN LOSSES (Details) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 33 false false R34.htm 1034 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 1) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails1 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 1) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 34 false false R35.htm 1035 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 2) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails2 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 2) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 35 false false R36.htm 1036 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails3 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 36 false false R37.htm 1037 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails4 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 37 false false R38.htm 1038 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 5) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails5 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 5) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 38 false false R39.htm 1039 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 6) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails6 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 6) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 39 false false R40.htm 1040 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 7) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetails7 LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 7) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 40 false false R41.htm 1041 - Disclosure - LOANS AND ALLOWANCE FOR LOAN LOSSES (Details Textual) Sheet http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesDetailsTextual LOANS AND ALLOWANCE FOR LOAN LOSSES (Details Textual) Details http://www.wellesleybank.com/role/LoansAndAllowanceForLoanLossesTables 41 false false R42.htm 1042 - Disclosure - FAIR VALUES OF FINANCIAL INSTRUMENTS (Details) Sheet http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsDetails FAIR VALUES OF FINANCIAL INSTRUMENTS (Details) Details http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsTables 42 false false R43.htm 1043 - Disclosure - FAIR VALUES OF FINANCIAL INSTRUMENTS (Details 1) Sheet http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsDetails1 FAIR VALUES OF FINANCIAL INSTRUMENTS (Details 1) Details http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsTables 43 false false R44.htm 1044 - Disclosure - FAIR VALUES OF FINANCIAL INSTRUMENTS (Details 2) Sheet http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsDetails2 FAIR VALUES OF FINANCIAL INSTRUMENTS (Details 2) Details http://www.wellesleybank.com/role/FairValuesOfFinancialInstrumentsTables 44 false false R45.htm 1045 - Disclosure - EMPLOYEE STOCK OWNERSHIP PLAN (Details) Sheet http://www.wellesleybank.com/role/EmployeeStockOwnershipPlanDetails EMPLOYEE STOCK OWNERSHIP PLAN (Details) Details http://www.wellesleybank.com/role/EmployeeStockOwnershipPlanTables 45 false false R46.htm 1046 - Disclosure - EMPLOYEE STOCK OWNERSHIP PLAN (Details Textual) Sheet http://www.wellesleybank.com/role/EmployeeStockOwnershipPlanDetailsTextual EMPLOYEE STOCK OWNERSHIP PLAN (Details Textual) Details http://www.wellesleybank.com/role/EmployeeStockOwnershipPlanTables 46 false false R47.htm 1047 - Disclosure - EQUITY INCENTIVE PLANS (Details) Sheet http://www.wellesleybank.com/role/EquityIncentivePlansDetails EQUITY INCENTIVE PLANS (Details) Details http://www.wellesleybank.com/role/EquityIncentivePlansTables 47 false false R48.htm 1048 - Disclosure - EQUITY INCENTIVE PLANS (Details Textual) Sheet http://www.wellesleybank.com/role/EquityIncentivePlansDetailsTextual EQUITY INCENTIVE PLANS (Details Textual) Details http://www.wellesleybank.com/role/EquityIncentivePlansTables 48 false false R49.htm 1049 - Disclosure - EARNINGS PER COMMON SHARE (Details) Sheet http://www.wellesleybank.com/role/EarningsPerCommonShareDetails EARNINGS PER COMMON SHARE (Details) Details http://www.wellesleybank.com/role/EarningsPerCommonShareTables 49 false false All Reports Book All Reports webk-20180630.xml webk-20180630.xsd webk-20180630_cal.xml webk-20180630_def.xml webk-20180630_lab.xml webk-20180630_pre.xml http://fasb.org/us-gaap/2018-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://fasb.org/srt/2018-01-31 true true