Allowance for Credit Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2019
Recorded Investment
Impaired loans with no related allowance recorded			$ 14,280
Impaired loans with a related allowance recorded			6,358
Total impaired loans			20,638
Unpaid Principal Balance
Impaired loans with no related allowance recorded			14,589
Impaired loans with a related allowance recorded			6,638
Total impaired loans			21,227
Related Allowance, Impaired loans			203
Average Recorded Investment
Impaired loans with no related allowance recorded	$ 14,883	$ 16,114
Impaired loans with a related allowance recorded	13,580	13,053
Total impaired loans	28,463	29,167
Interest Income Recognized
Impaired loans with no related allowance recorded	226	578
Impaired loans with a related allowance recorded	174	336
Total impaired loans	400	914
Commercial and Industrial
Recorded Investment
Impaired loans with no related allowance recorded			3,825
Impaired loans with a related allowance recorded			1,126
Total impaired loans			4,951
Unpaid Principal Balance
Impaired loans with no related allowance recorded			3,841
Impaired loans with a related allowance recorded			1,126
Total impaired loans			4,967
Related Allowance, Impaired loans			46
Average Recorded Investment
Impaired loans with no related allowance recorded	3,833	4,038
Impaired loans with a related allowance recorded	5,645	5,187
Total impaired loans	9,478	9,225
Interest Income Recognized
Impaired loans with no related allowance recorded	94	175
Impaired loans with a related allowance recorded	61	117
Total impaired loans	155	292
Commercial real estate
Recorded Investment
Impaired loans with no related allowance recorded			30
Impaired loans with a related allowance recorded			693
Total impaired loans			723
Unpaid Principal Balance
Impaired loans with no related allowance recorded			30
Impaired loans with a related allowance recorded			693
Total impaired loans			723
Related Allowance, Impaired loans			27
Average Recorded Investment
Impaired loans with no related allowance recorded	3,102	3,740
Impaired loans with a related allowance recorded	715	719
Total impaired loans	3,817	4,459
Interest Income Recognized
Impaired loans with no related allowance recorded	40	212
Impaired loans with a related allowance recorded	10	20
Total impaired loans	50	232
Residential
Recorded Investment
Impaired loans with no related allowance recorded			10,425
Impaired loans with a related allowance recorded			4,539
Total impaired loans			14,964
Unpaid Principal Balance
Impaired loans with no related allowance recorded			10,718
Impaired loans with a related allowance recorded			4,819
Total impaired loans			15,537
Related Allowance, Impaired loans			$ 130
Average Recorded Investment
Impaired loans with no related allowance recorded	7,948	8,336
Impaired loans with a related allowance recorded	7,220	7,147
Total impaired loans	15,168	15,483
Interest Income Recognized
Impaired loans with no related allowance recorded	92	191
Impaired loans with a related allowance recorded	103	199
Total impaired loans	$ 195	$ 390