Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - TDR Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance			$ 21,747
Ending balance	$ 16,678	$ 6,510	16,678	$ 6,510
Material commitments to lend additional funds to borrowers with TDRs	0		0		$ 530
Accruing
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	1,201	1,441	1,233	1,866
Additions	0	0	0	12
Net payments	(13)	(19)	(45)	(73)
Net transfers to non-accrual	(347)	0	(347)	(383)
Ending balance	841	1,422	841	1,422
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	12,093	7,841	20,514	6,612
Additions	11,636	0	11,636	0
Net payments	(5,886)	(2,753)	(8,205)	(1,279)
Charge-offs	(2,353)	0	(8,455)	(628)
Net transfers from accruing	347	0	347	383
Ending balance	$ 15,837	$ 5,088	$ 15,837	$ 5,088