Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - TDR Rollforward (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance			$ 12,516,000
Ending balance	$ 8,185,000	$ 13,294,000	8,185,000	$ 13,294,000
Material commitments to lend additional funds to borrowers with TDRs	0		0		$ 0
Accruing
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	798,000	1,216,000	813,000	1,233,000
Additions	0	0	0	0
Net payments	(16,000)	(15,000)	(31,000)	(32,000)
Net transfers to non-accrual	0	0	0	0
Ending balance	782,000	1,201,000	782,000	1,201,000
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	8,011,000	17,917,000	11,703,000	20,514,000
Additions	0	0	0	934,000
Net payments	(609,000)	(2,595,000)	(3,274,000)	(3,253,000)
Charge-offs	1,000	(3,229,000)	(1,026,000)	(6,102,000)
Net transfers from accruing	0	0	0	0
Ending balance	$ 7,403,000	$ 12,093,000	$ 7,403,000	$ 12,093,000