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Loans Receivable and Allowance for Loan Losses (Non-Accruing Loans) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 14,405 | $ 16,396
Originated loans [Member] | Residential [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | 701 | 1,736
Originated loans [Member] | Commercial & Multi-family [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | 7,962 | 8,721
Originated loans [Member] | Commercial Business [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | 5,307 | 5,383
Originated loans [Member] | Home Equity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Non-accrual loans | $ 435 | $ 556

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