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Fair Values of Financial Instruments (Carrying Values and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 83,543	$ 99,756
Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	328,257	261,229
Interest-earning time deposits	735	735
Debt securities available for sale	83,543	99,756
Equity investments	20,841	17,717
Loans held for sale	3,154	3,530
Loans receivable, net	2,312,559	2,295,021
FHLB of New York stock, at cost	8,881	11,324
Accrued interest receivable	10,621	12,924
Deposits	2,445,814	2,318,050
Borrowings	128,436	191,161
Subordinated debentures	37,159	37,042
Accrued interest payable	1,198	1,463
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	328,257	261,229
Interest-earning time deposits	735	735
Debt securities available for sale	83,543	99,756
Equity investments	20,841	17,717
Loans held for sale	3,154	3,530
Loans receivable, net	2,265,730	2,309,118
FHLB of New York stock, at cost	8,881	11,324
Accrued interest receivable	10,621	12,924
Deposits	2,348,278	2,323,561
Borrowings	130,432	194,899
Subordinated debentures	46,445	37,252
Accrued interest payable	1,198	1,463
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	328,257	261,229
Equity investments	20,841	17,717
Deposits	1,668,884	1,627,871
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest-earning time deposits	735	735
Debt securities available for sale	83,543	99,756
Loans held for sale	3,154	3,530
FHLB of New York stock, at cost	8,881	11,324
Accrued interest receivable	10,621	12,924
Deposits	679,394	695,690
Borrowings	130,432	194,899
Subordinated debentures	46,445	37,252
Accrued interest payable	1,198	1,463
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, net	$ 2,265,730	$ 2,309,118

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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Fair value portion of receivables, including, but not limited to, trade account receivables, note receivables, and loan receivables.

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