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Troubled Debt Restructurings (Narrative) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) loan contract | Dec. 31, 2020 USD ($) loan
Financing Receivable Modifications [Line Items] |  |
Number of troubled debt restructured loans | loan | 18 | 17
Financing Receivable, Modifications, Nonaccrual, Number of Contracts | loan | 2 | 3
Financing Receivable, Modifications, Nonaccrual, Recorded Investment | $ | $ 126 | $ 796
Total troubled debt restructured loans | $ | $ 3,400 | $ 3,300
Number of deferral loans of interest and principal payments | loan | 1 | 255
Deferrals on outstanding loan balances | $ | $ 127,400 |
Number of loans making payment after deferral option passed | loan | 253 |
Number of contractions modified by granting concession | contract | 2 |
Residential Single Family |  |
Financing Receivable Modifications [Line Items] |  |
Loan is considered payment default | 30 days |
Payment Deferral [Member] | CARES Act [Member] |  |
Financing Receivable Modifications [Line Items] |  |
Deferrals on outstanding loan balances | $ | $ 3 | $ 130,500

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