Loans - Troubled Debt Restructuring (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) loan	Mar. 31, 2021 USD ($) loan	Dec. 31, 2021 USD ($)
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 12,812	$ 13,384
Number of loans modified as a TDR \| loan	2	2
Number of loans modified as TDR, subsequent default \| loan	0
Troubled Debt Restructuring (TDR)
Financing Receivable, Impaired [Line Items]
Impaired loan reserve	$ 0		$ 0
Troubled Debt Restructuring (TDR) \| Performing
Financing Receivable, Impaired [Line Items]
Average recorded investment	$ 1,900		$ 1,100

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Number of financing receivables that have been modified by troubled debt restructurings.

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Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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