Allowance for Credit Losses and Credit Quality of Loans, Past Due Loans (Details) $ in Thousands	Mar. 31, 2022 USD ($) Relationship	Dec. 31, 2021 USD ($) Relationship
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Individually evaluated loans, number of relationships | Relationship	5	5
Individually evaluated loans, amortized cost	$ 9,900	$ 10,200
Individually evaluated loans, allowance for credit losses	0	0
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	25,812	30,285
Recorded total loans	7,649,826	7,498,459
Loans in non-accrual without an allowance for credit losses	0	0
Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	18,723	21,395
31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	12,933	15,022
61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	3,846	3,915
Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,944	2,458
Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	7,605,291	7,446,779
C&I [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,176,249	1,130,670
CRE [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	2,629,410	2,564,987
PPP [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	50,977	101,222
Auto [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	859,790	826,508
Other Consumer [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	895,151	839,390
Commercial Loans [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	15,897	16,344
Recorded total loans	3,856,636	3,796,879
Commercial Loans [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	2,252	1,973
Commercial Loans [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,619	1,841
Commercial Loans [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	633	132
Commercial Loans [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	0	0
Commercial Loans [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	3,838,487	3,778,562
Commercial Loans [Member] | C&I [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	3,345	3,618
Recorded total loans	1,176,249	1,130,670
Commercial Loans [Member] | C&I [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,109	622
Commercial Loans [Member] | C&I [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	476	622
Commercial Loans [Member] | C&I [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	633	0
Commercial Loans [Member] | C&I [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	0	0
Commercial Loans [Member] | C&I [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,171,795	1,126,430
Commercial Loans [Member] | CRE [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	12,552	12,726
Recorded total loans	2,629,410	2,564,987
Commercial Loans [Member] | CRE [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,066	1,351
Commercial Loans [Member] | CRE [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,066	1,219
Commercial Loans [Member] | CRE [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	0	132
Commercial Loans [Member] | CRE [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	0	0
Commercial Loans [Member] | CRE [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	2,615,792	2,550,910
Commercial Loans [Member] | PPP [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	0	0
Recorded total loans	50,977	101,222
Commercial Loans [Member] | PPP [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	77	0
Commercial Loans [Member] | PPP [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	77	0
Commercial Loans [Member] | PPP [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	0	0
Commercial Loans [Member] | PPP [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	0	0
Commercial Loans [Member] | PPP [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	50,900	101,222
Consumer Loans [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	1,923	1,528
Recorded total loans	1,754,941	1,665,898
Consumer Loans [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	13,616	15,713
Consumer Loans [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	9,553	10,700
Consumer Loans [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	2,681	3,363
Consumer Loans [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,382	1,650
Consumer Loans [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,739,402	1,648,657
Consumer Loans [Member] | Auto [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	1,622	1,295
Recorded total loans	859,790	826,508
Consumer Loans [Member] | Auto [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	7,743	9,003
Consumer Loans [Member] | Auto [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	6,250	6,911
Consumer Loans [Member] | Auto [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,038	1,547
Consumer Loans [Member] | Auto [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	455	545
Consumer Loans [Member] | Auto [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	850,425	816,210
Consumer Loans [Member] | Other Consumer [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	301	233
Recorded total loans	895,151	839,390
Consumer Loans [Member] | Other Consumer [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	5,873	6,710
Consumer Loans [Member] | Other Consumer [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	3,303	3,789
Consumer Loans [Member] | Other Consumer [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,643	1,816
Consumer Loans [Member] | Other Consumer [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	927	1,105
Consumer Loans [Member] | Other Consumer [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	888,977	832,447
Residential [Member]
Past Due and Nonperforming Loans [Abstract]
Nonaccrual	7,992	12,413
Recorded total loans	2,038,249	2,035,682
Residential [Member] | Past Due [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	2,855	3,709
Residential [Member] | 31-60 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	1,761	2,481
Residential [Member] | 61-90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	532	420
Residential [Member] | Greater Than 90 Days Past Due Accruing [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	562	808
Residential [Member] | Current [Member]
Past Due and Nonperforming Loans [Abstract]
Recorded total loans	$ 2,027,402	$ 2,019,560