Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - TDR Rollforward (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance			$ 12,516,000
Ending balance	$ 7,265,000	$ 16,678,000	7,265,000	$ 16,678,000
Material commitments to lend additional funds to borrowers with TDRs	0		0		$ 0
Accruing
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	782,000	1,201,000	813,000	1,233,000
Additions	0	0	0	0
Net payments	(243,000)	(13,000)	(274,000)	(45,000)
Net transfers to non-accrual	0	(347,000)	0	(347,000)
Ending balance	539,000	841,000	539,000	841,000
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	7,403,000	12,093,000	11,703,000	20,514,000
Additions	0	11,636,000	0	11,636,000
Net payments	(677,000)	(5,886,000)	(3,951,000)	(8,205,000)
Charge-offs	0	(2,353,000)	(1,026,000)	(8,455,000)
Net transfers from accruing	0	347,000	0	347,000
Ending balance	$ 6,726,000	$ 15,837,000	$ 6,726,000	$ 15,837,000