Loans and Leases and the Allowance for Credit Losses - Schedule of Amortized Cost Basis of Loans and Leases by Credit Quality Indicator, Loan Class, and Year of Origination (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	$ 2,785,941	$ 3,669,902
2020	2,832,060	1,701,148
2019	1,198,735	1,078,600
2018	751,953	879,110
2017	587,413	932,627
Prior	1,839,710	1,545,761
Revolving Loans	2,039,657	2,091,726
Revolving Loans Converted to Term Loans	37,281	41,146
Total Loans and Leases	12,072,750	11,940,020
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	1,304,099	2,078,659
2020	1,436,940	764,275
2019	532,943	531,323
2018	388,910	315,087
2017	237,316	343,502
Prior	719,421	568,609
Revolving Loans	371,713	498,207
Revolving Loans Converted to Term Loans	682	1,024
Total Loans and Leases	4,992,024	5,100,686
Commercial | Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	337,699	470,690
2020	376,530	150,800
2019	91,563	151,734
2018	82,576	50,162
2017	32,521	52,483
Prior	107,650	87,530
Revolving Loans	296,225	393,187
Revolving Loans Converted to Term Loans	682	1,024
Total Loans and Leases	1,325,446	1,357,610
Commercial | Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	335,503	426,780
2020	341,306	149,024
2019	91,475	149,468
2018	80,521	49,385
2017	31,948	52,354
Prior	89,088	68,269
Revolving Loans	257,097	342,339
Revolving Loans Converted to Term Loans	589	847
Total Loans and Leases	1,227,527	1,238,466
Commercial | Commercial and Industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	2,008	11,702
2020	33,200	42
2019	0	0
2018	0	0
2017	0	110
Prior	153	95
Revolving Loans	25,343	32,319
Revolving Loans Converted to Term Loans	26	52
Total Loans and Leases	60,730	44,320
Commercial | Commercial and Industrial | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	188	32,208
2020	2,024	1,734
2019	88	2,266
2018	2,055	777
2017	573	19
Prior	18,409	19,166
Revolving Loans	13,785	18,529
Revolving Loans Converted to Term Loans	67	125
Total Loans and Leases	37,189	74,824
Commercial | PPP
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	196,837	517,683
2020	71,643	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	268,480	517,683
Commercial | PPP | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	196,837	517,683
2020	71,643	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	268,480	517,683
Commercial | Commercial Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	649,163	963,839
2020	854,756	487,545
2019	363,141	353,437
2018	294,693	252,548
2017	201,315	281,267
Prior	570,240	439,324
Revolving Loans	61,212	76,869
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	2,994,520	2,854,829
Commercial | Commercial Mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	608,445	847,676
2020	774,572	458,472
2019	362,497	350,363
2018	264,407	245,157
2017	196,531	267,860
Prior	554,832	425,157
Revolving Loans	61,212	76,869
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	2,822,496	2,671,554
Commercial | Commercial Mortgage | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	39,129	66,523
2020	69,618	28,418
2019	0	291
2018	30,286	7,117
2017	0	8,665
Prior	6,122	5,035
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	145,155	116,049
Commercial | Commercial Mortgage | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	1,589	49,640
2020	10,566	655
2019	644	2,783
2018	0	274
2017	4,784	4,742
Prior	9,286	9,132
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	26,869	67,226
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	101,403	106,508
2020	118,076	105,731
2019	61,403	11,275
2018	0	8,133
2017	894	0
Prior	0	0
Revolving Loans	14,276	28,151
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	296,052	259,798
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	101,403	106,508
2020	118,076	105,731
2019	61,403	11,275
2018	0	8,133
2017	894	0
Prior	0	0
Revolving Loans	14,276	28,151
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	296,052	259,798
Commercial | Lease Financing
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	18,997	19,939
2020	15,935	20,199
2019	16,836	14,877
2018	11,641	4,244
2017	2,586	9,752
Prior	41,531	41,755
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	107,526	110,766
Commercial | Lease Financing | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	18,997	19,906
2020	15,935	20,132
2019	16,836	13,785
2018	10,749	4,202
2017	2,586	9,657
Prior	41,531	41,755
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	106,634	109,437
Commercial | Lease Financing | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0
2020	0
2019	0
2018	892
2017	0
Prior	0
Revolving Loans	0
Revolving Loans Converted to Term Loans	0
Total Loans and Leases	892
Commercial | Lease Financing | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021		33
2020		67
2019		1,092
2018		42
2017		95
Prior		0
Revolving Loans		0
Revolving Loans Converted to Term Loans		0
Total Loans and Leases		1,329
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	1,481,842	1,591,243
2020	1,395,120	936,873
2019	665,792	547,277
2018	363,043	564,023
2017	350,097	589,125
Prior	1,120,289	977,152
Revolving Loans	1,667,944	1,593,519
Revolving Loans Converted to Term Loans	36,599	40,122
Total Loans and Leases	7,080,726	6,839,334
Consumer | Residential Mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	1,120,627	1,300,831
2020	1,173,498	576,746
2019	403,698	295,522
2018	201,297	455,197
2017	287,593	545,798
Prior	1,085,827	956,419
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	4,272,540	4,130,513
Consumer | Residential Mortgage | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	1,120,627	1,300,831
2020	1,173,498	576,452
2019	403,404	295,522
2018	201,297	454,165
2017	285,312	545,798
Prior	1,083,359	954,120
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	4,267,497	4,126,888
Consumer | Residential Mortgage | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	294
2019	294	0
2018	0	1,032
2017	2,281	0
Prior	2,468	2,299
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	5,043	3,625
Consumer | Home Equity Loan
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	3,395	4,537
Revolving Loans	1,641,723	1,561,364
Revolving Loans Converted to Term Loans	35,111	38,637
Total Loans and Leases	1,680,229	1,604,538
Consumer | Home Equity Loan | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	3,282	4,449
Revolving Loans	1,636,803	1,556,671
Revolving Loans Converted to Term Loans	34,308	37,559
Total Loans and Leases	1,674,393	1,598,679
Consumer | Home Equity Loan | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	0
2020	0	0
2019	0	0
2018	0	0
2017	0	0
Prior	113	88
Revolving Loans	4,920	4,693
Revolving Loans Converted to Term Loans	803	1,078
Total Loans and Leases	5,836	5,859
Consumer | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	233,427	219,319
2020	166,735	214,159
2019	155,992	158,387
2018	105,988	68,889
2017	40,984	34,060
Prior	24,108	13,986
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	727,234	708,800
Consumer | Automobile | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	233,401	219,218
2020	166,682	213,914
2019	155,905	158,216
2018	105,933	68,776
2017	40,967	33,899
Prior	23,952	13,850
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	726,840	707,873
Consumer | Automobile | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	26	101
2020	53	245
2019	87	171
2018	55	113
2017	17	161
Prior	156	136
Revolving Loans	0	0
Revolving Loans Converted to Term Loans	0	0
Total Loans and Leases	394	927
Consumer | Other Loans
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	127,788	71,093
2020	54,887	145,968
2019	106,102	93,368
2018	55,758	39,937
2017	21,520	9,267
Prior	6,959	2,210
Revolving Loans	26,221	32,155
Revolving Loans Converted to Term Loans	1,488	1,485
Total Loans and Leases	400,723	395,483
Consumer | Other Loans | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	127,788	71,042
2020	54,794	145,549
2019	105,858	92,993
2018	55,663	39,770
2017	21,442	9,225
Prior	6,949	2,189
Revolving Loans	26,151	32,070
Revolving Loans Converted to Term Loans	1,485	1,485
Total Loans and Leases	400,130	394,323
Consumer | Other Loans | Classified
Financing Receivable, Credit Quality Indicator [Line Items]
YTD March 31, 2021	0	51
2020	93	419
2019	244	375
2018	95	167
2017	78	42
Prior	10	21
Revolving Loans	70	85
Revolving Loans Converted to Term Loans	3	0
Total Loans and Leases	$ 593	$ 1,160