Allowance for Loan and Lease Losses - Impaired Loans and Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Recorded Investment
Impaired loans with no related allowance recorded	$ 14,280	$ 18,577
Impaired loans with a related allowance recorded	6,358	11,999
Total impaired loans	20,638	30,576
Unpaid Principal Balance
Impaired loans with no related allowance recorded	14,589	18,940
Impaired loans with a related allowance recorded	6,638	12,384
Total impaired loans	21,227	31,324
Related Allowance, Impaired loans	203	536
Average Recorded Investment
Impaired loans with no related allowance recorded	15,329	29,886	$ 38,418
Impaired loans with a related allowance recorded	11,608	11,465	12,387
Total impaired loans	26,937	41,351	50,805
Interest Income Recognized
Impaired loans with no related allowance recorded	1,352	1,259	1,874
Impaired loans with a related allowance recorded	464	675	396
Total impaired loans	1,816	1,934	2,270
Commercial and Industrial
Recorded Investment
Impaired loans with no related allowance recorded	3,825	4,449
Impaired loans with a related allowance recorded	1,126	4,270
Total impaired loans	4,951	8,719
Unpaid Principal Balance
Impaired loans with no related allowance recorded	3,841	4,498
Impaired loans with a related allowance recorded	1,126	4,270
Total impaired loans	4,967	8,768
Related Allowance, Impaired loans	46	108
Average Recorded Investment
Impaired loans with no related allowance recorded	3,687	11,409	19,929
Impaired loans with a related allowance recorded	4,485	3,154	2,572
Total impaired loans	8,172	14,563	22,501
Interest Income Recognized
Impaired loans with no related allowance recorded	431	408	890
Impaired loans with a related allowance recorded	85	273	10
Total impaired loans	516	681	900
Commercial real estate
Recorded Investment
Impaired loans with no related allowance recorded	30	5,016
Impaired loans with a related allowance recorded	693	727
Total impaired loans	723	5,743
Unpaid Principal Balance
Impaired loans with no related allowance recorded	30	5,016
Impaired loans with a related allowance recorded	693	727
Total impaired loans	723	5,743
Related Allowance, Impaired loans	27	32
Average Recorded Investment
Impaired loans with no related allowance recorded	2,825	7,873	9,846
Impaired loans with a related allowance recorded	710	942	918
Total impaired loans	3,535	8,815	10,764
Interest Income Recognized
Impaired loans with no related allowance recorded	481	231	417
Impaired loans with a related allowance recorded	40	67	42
Total impaired loans	521	298	459
Construction
Average Recorded Investment
Impaired loans with no related allowance recorded		1,248
Total impaired loans		1,248
Interest Income Recognized
Impaired loans with no related allowance recorded		91
Total impaired loans		91
Residential
Recorded Investment
Impaired loans with no related allowance recorded	10,425	9,112
Impaired loans with a related allowance recorded	4,539	7,002
Total impaired loans	14,964	16,114
Unpaid Principal Balance
Impaired loans with no related allowance recorded	10,718	9,426
Impaired loans with a related allowance recorded	4,819	7,387
Total impaired loans	15,537	16,813
Related Allowance, Impaired loans	130	396
Average Recorded Investment
Impaired loans with no related allowance recorded	8,777	9,356	8,582
Impaired loans with a related allowance recorded	6,413	7,369	8,897
Total impaired loans	15,190	16,725	17,479
Interest Income Recognized
Impaired loans with no related allowance recorded	440	529	567
Impaired loans with a related allowance recorded	339	335	344
Total impaired loans	779	$ 864	911
Consumer
Average Recorded Investment
Impaired loans with no related allowance recorded	40
Total impaired loans	$ 40
Lease financing
Average Recorded Investment
Impaired loans with no related allowance recorded			61
Total impaired loans			$ 61