Allowance for Loan and Lease Losses and Credit Quality - Balance of Impaired Loans and Leases With and Without Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	$ 251,943	$ 175,828
Loan and Lease Balance	176,537	151,593
Related Allowance Recorded	7,237	30,047
Average Loan and Lease Balance	164,064	161,521	$ 195,552
Interest Income Recognized	5,998	5,121	7,076
Impaired Loans With Valuation Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	68,965	131,658
Loan and Lease Balance	66,049	123,455
Related Allowance Recorded	7,237	30,047
Average Loan and Lease Balance	94,752	133,884	165,050
Interest Income Recognized	3,171	3,544	4,599
Impaired Loans With Valuation Allowance | Commercial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	35,250	40,349
Loan and Lease Balance	35,008	36,800
Related Allowance Recorded	5,769	7,462
Average Loan and Lease Balance	35,904	34,873	28,648
Interest Income Recognized	379	282	363
Impaired Loans With Valuation Allowance | Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	20,069	35,444
Loan and Lease Balance	20,090	32,326
Related Allowance Recorded	2,844	6,354
Average Loan and Lease Balance	26,208	29,285	20,260
Interest Income Recognized	54	282	347
Impaired Loans With Valuation Allowance | Commercial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	4,225	4,905
Loan and Lease Balance	3,962	4,474
Related Allowance Recorded	333	1,108
Average Loan and Lease Balance	4,218	5,588	8,388
Interest Income Recognized	172	0	16
Impaired Loans With Valuation Allowance | Commercial | Lease financing
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	10,956	0
Loan and Lease Balance	10,956	0
Related Allowance Recorded	2,592	0
Average Loan and Lease Balance	5,478	0	0
Interest Income Recognized	153	0	0
Impaired Loans With Valuation Allowance | Consumer Loan Portfolio
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	33,715	91,309
Loan and Lease Balance	31,041	86,655
Related Allowance Recorded	1,468	22,585
Average Loan and Lease Balance	58,848	99,011	136,402
Interest Income Recognized	2,792	3,262	4,236
Impaired Loans With Valuation Allowance | Consumer Loan Portfolio | Residential mortgage
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	24,297	63,004
Loan and Lease Balance	22,250	60,172
Related Allowance Recorded	1,030	17,216
Average Loan and Lease Balance	41,211	68,850	89,247
Interest Income Recognized	1,942	1,653	2,125
Impaired Loans With Valuation Allowance | Consumer Loan Portfolio | Consumer installment
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	0	919
Loan and Lease Balance	0	647
Related Allowance Recorded	0	81
Average Loan and Lease Balance	324	834	3,223
Interest Income Recognized	1	0	0
Impaired Loans With Valuation Allowance | Consumer Loan Portfolio | Home equity
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	9,418	27,386
Loan and Lease Balance	8,791	25,836
Related Allowance Recorded	438	5,288
Average Loan and Lease Balance	17,313	29,327	43,932
Interest Income Recognized	849	1,609	2,111
Impaired Loans With No Valuation Allowance
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	182,978	44,170
Loan and Lease Balance	110,488	28,138
Related Allowance Recorded	0	0
Average Loan and Lease Balance	69,312	27,637	30,502
Interest Income Recognized	2,827	1,577	2,477
Impaired Loans With No Valuation Allowance | Commercial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	125,032	6,514
Loan and Lease Balance	80,835	6,445
Related Allowance Recorded	0	0
Average Loan and Lease Balance	43,639	6,877	12,107
Interest Income Recognized	1,414	404	909
Impaired Loans With No Valuation Allowance | Commercial | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	55,889	2,239
Loan and Lease Balance	39,098	2,237
Related Allowance Recorded	0	0
Average Loan and Lease Balance	20,667	2,527	1,971
Interest Income Recognized	205	173	200
Impaired Loans With No Valuation Allowance | Commercial | Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	69,143	4,275
Loan and Lease Balance	41,737	4,208
Related Allowance Recorded	0	0
Average Loan and Lease Balance	22,972	4,350	10,136
Interest Income Recognized	1,209	231	709
Impaired Loans With No Valuation Allowance | Consumer Loan Portfolio
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	57,946	37,656
Loan and Lease Balance	29,653	21,693
Related Allowance Recorded	0	0
Average Loan and Lease Balance	25,673	20,760	18,395
Interest Income Recognized	1,413	1,173	1,568
Impaired Loans With No Valuation Allowance | Consumer Loan Portfolio | Residential mortgage
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	31,142	11,636
Loan and Lease Balance	22,594	9,494
Related Allowance Recorded	0	0
Average Loan and Lease Balance	16,044	9,923	11,428
Interest Income Recognized	983	655	896
Impaired Loans With No Valuation Allowance | Consumer Loan Portfolio | Consumer installment
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	2,095	15,400
Loan and Lease Balance	880	10,770
Related Allowance Recorded	0	0
Average Loan and Lease Balance	5,825	9,284	5,103
Interest Income Recognized	256	302	209
Impaired Loans With No Valuation Allowance | Consumer Loan Portfolio | Home equity
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Balance	24,709	10,620
Loan and Lease Balance	6,179	1,429
Related Allowance Recorded	0	0
Average Loan and Lease Balance	3,804	1,553	1,864
Interest Income Recognized	$ 174	$ 216	$ 463