Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
With No Related Allowance Recorded:
Recorded Investment	$ 23,634	$ 3,740
Unpaid Principal Balance	23,846	3,765
Average Recorded Investment	28,115	3,985
Interest Income Recognized	872	203
With A Related Allowance Recorded:
Recorded Investment	11,026	4,024
Related Allowance	2,855	884
Unpaid Principal Balance	11,056	4,175
Average Recorded Investment	11,219	4,150
Interest Income Recognized	336	194
Total Impaired Loans:
Recorded Investment	34,660	7,764
Unpaid Principal Balance	34,902	7,940
Average Recorded Investment	39,334	8,135
Interest Income Recognized	1,208	397
Real Estate | Residential
With No Related Allowance Recorded:
Recorded Investment	1,216	549
Unpaid Principal Balance	1,220	553
Average Recorded Investment	1,220	494
Interest Income Recognized	34	20
With A Related Allowance Recorded:
Related Allowance	0	0
Total Impaired Loans:
Recorded Investment	1,216	549
Unpaid Principal Balance	1,220	553
Average Recorded Investment	1,220	494
Interest Income Recognized	34	20
Real Estate | Commercial
With No Related Allowance Recorded:
Recorded Investment	20,896	3,058
Unpaid Principal Balance	20,916	3,077
Average Recorded Investment	25,193	3,335
Interest Income Recognized	811	177
With A Related Allowance Recorded:
Recorded Investment	9,498	1,646
Related Allowance	2,248	274
Unpaid Principal Balance	9,528	1,646
Average Recorded Investment	9,610	1,702
Interest Income Recognized	291	81
Total Impaired Loans:
Recorded Investment	30,394	4,704
Unpaid Principal Balance	30,444	4,723
Average Recorded Investment	34,803	5,037
Interest Income Recognized	1,102	258
Real Estate | Construction
With No Related Allowance Recorded:
Recorded Investment	641
Unpaid Principal Balance	641
Average Recorded Investment	766
Interest Income Recognized	21
With A Related Allowance Recorded:
Related Allowance	0
Total Impaired Loans:
Recorded Investment	641
Unpaid Principal Balance	641
Average Recorded Investment	766
Interest Income Recognized	21
Commercial and Industrial
With No Related Allowance Recorded:
Recorded Investment	881	133
Unpaid Principal Balance	1,069	135
Average Recorded Investment	936	156
Interest Income Recognized	6	6
With A Related Allowance Recorded:
Recorded Investment	1,528	2,378
Related Allowance	607	610
Unpaid Principal Balance	1,528	2,529
Average Recorded Investment	1,609	2,448
Interest Income Recognized	45	113
Total Impaired Loans:
Recorded Investment	2,409	2,511
Unpaid Principal Balance	2,597	2,664
Average Recorded Investment	2,545	2,604
Interest Income Recognized	$ 51	$ 119