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Troubled Debt Restructurings (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($) loan contract	Jun. 30, 2020 contract	Jun. 30, 2021 USD ($) loan contract	Jun. 30, 2020 contract	Dec. 31, 2020 USD ($) loan
Financing Receivable Modifications [Line Items]
Number of troubled debt restructured loans | loan			17		17
Financing Receivable, Modifications, Nonaccrual, Number of Contracts | loan	3		3		3
Financing Receivable, Modifications, Nonaccrual, Recorded Investment | $	$ 809		$ 809		$ 796
Total troubled debt restructured loans | $	$ 2,800		$ 2,800		$ 3,300
Number of deferral loans of interest and principal payments | loan	2		2		255
Deferrals on outstanding loan balances | $	$ 107,000		$ 107,000
Number of loans making payment after deferral option passed | loan	254		254
Number of contractions modified by granting concession | contract	1		3
Number of payment defaults | contract	0	0	0	0
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 | $	$ 41		$ 41		$ 130,500

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