Allowance for Credit Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	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	$ 16,186
Impaired loans with a related allowance recorded	13,857
Total impaired loans	30,043
Interest Income Recognized
Impaired loans with no related allowance recorded	300
Impaired loans with a related allowance recorded	214
Total impaired loans	514
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	3,418
Impaired loans with a related allowance recorded	5,978
Total impaired loans	9,396
Interest Income Recognized
Impaired loans with no related allowance recorded	29
Impaired loans with a related allowance recorded	108
Total impaired loans	137
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	4,102
Impaired loans with a related allowance recorded	723
Total impaired loans	4,825
Interest Income Recognized
Impaired loans with no related allowance recorded	171
Impaired loans with a related allowance recorded	10
Total impaired loans	181
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	8,666
Impaired loans with a related allowance recorded	7,156
Total impaired loans	15,822
Interest Income Recognized
Impaired loans with no related allowance recorded	100
Impaired loans with a related allowance recorded	96
Total impaired loans	$ 196