Past Due Loans, Allowance For Credit Losses, Non-Accrual Loans, and TDRS - TDR Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance			$ 21,747
Ending balance	$ 13,294	$ 9,282	13,294	$ 9,282
Material commitments to lend additional funds to borrowers with TDRs	813		813		$ 530
Accruing
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	1,216	1,844	1,233	1,866
Additions	0	0	0	12
Net payments	(15)	(20)	(32)	(54)
Net transfers to non-accrual	0	(383)	0	(383)
Ending balance	1,201	1,441	1,201	1,441
Non-accrual
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	17,917	9,375	20,514	6,612
Additions	0	0	934	0
Net payments	(2,595)	(1,447)	(3,253)	1,474
Charge-offs	(3,229)	(470)	(6,102)	(628)
Net transfers from accruing	0	383	0	383
Ending balance	$ 12,093	$ 7,841	$ 12,093	$ 7,841