Allowance for Credit Losses and Credit Quality of Loans, Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Minimum number of days past due for loans to be considered nonperforming	90 days
Credit Quality by Loan Class [Abstract]
2022/2021	$ 556,430	$ 2,045,326
2021/2020	1,909,264	1,179,768
2020/2019	1,139,257	993,265
2019/2018	932,970	680,836
2018/2017	637,129	528,706
Prior	1,712,646	1,294,841
Revolving Loans Amortized Cost Basis	726,511	703,846
Revolving Loans Converted to Term	35,619	71,871
Total	7,649,826	7,498,459
C&I [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	93,408	337,315
2021/2020	313,935	226,060
2020/2019	215,298	126,268
2019/2018	117,631	66,928
2018/2017	62,050	25,460
Prior	51,890	36,529
Revolving Loans Amortized Cost Basis	319,054	295,823
Revolving Loans Converted to Term	2,983	16,287
Total	1,176,249	1,130,670
C&I [Member] | Pass [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	93,408	335,685
2021/2020	312,325	219,931
2020/2019	210,961	114,617
2019/2018	108,348	64,310
2018/2017	59,572	20,137
Prior	43,397	32,146
Revolving Loans Amortized Cost Basis	303,639	280,476
Revolving Loans Converted to Term	2,964	15,731
Total	1,134,614	1,083,033
C&I [Member] | Special Mention [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	148
2021/2020	142	5,255
2020/2019	3,497	4,641
2019/2018	2,493	2,430
2018/2017	1,969	2,699
Prior	3,192	1,111
Revolving Loans Amortized Cost Basis	11,591	11,835
Revolving Loans Converted to Term	0	522
Total	22,884	28,641
C&I [Member] | Substandard [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	1,482
2021/2020	1,468	874
2020/2019	840	7,010
2019/2018	6,790	187
2018/2017	509	2,582
Prior	5,300	3,272
Revolving Loans Amortized Cost Basis	3,824	3,512
Revolving Loans Converted to Term	19	34
Total	18,750	18,953
C&I [Member] | Doubtful [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	0
2021/2020	0	0
2020/2019	0	0
2019/2018	0	1
2018/2017	0	42
Prior	1	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	1	43
CRE [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	120,932	490,089
2021/2020	487,158	435,769
2020/2019	445,733	386,151
2019/2018	378,238	252,752
2018/2017	248,186	278,885
Prior	769,120	534,088
Revolving Loans Amortized Cost Basis	157,740	142,891
Revolving Loans Converted to Term	22,303	44,362
Total	2,629,410	2,564,987
CRE [Member] | Pass [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	120,316	489,300
2021/2020	486,375	434,866
2020/2019	444,779	370,377
2019/2018	362,644	236,274
2018/2017	234,268	251,082
Prior	660,198	441,310
Revolving Loans Amortized Cost Basis	153,714	141,367
Revolving Loans Converted to Term	21,009	43,942
Total	2,483,303	2,408,518
CRE [Member] | Special Mention [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	616	789
2021/2020	783	826
2020/2019	815	11,235
2019/2018	10,766	3,544
2018/2017	1,122	15,379
Prior	68,783	53,372
Revolving Loans Amortized Cost Basis	0	780
Revolving Loans Converted to Term	1,294	420
Total	84,179	86,345
CRE [Member] | Substandard [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	0
2021/2020	0	77
2020/2019	139	4,539
2019/2018	4,828	12,934
2018/2017	12,796	12,424
Prior	35,421	34,563
Revolving Loans Amortized Cost Basis	4,026	744
Revolving Loans Converted to Term	0	0
Total	57,210	65,281
CRE [Member] | Doubtful [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	0
2021/2020	0	0
2020/2019	0	0
2019/2018	0	0
2018/2017	0	0
Prior	4,718	4,843
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	4,718	4,843
PPP [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	92,884
2021/2020	49,017	8,338
2020/2019	1,960	0
2019/2018	0	0
2018/2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	50,977	101,222
PPP [Member] | Pass [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	92,884
2021/2020	49,017	8,338
2020/2019	1,960	0
2019/2018	0	0
2018/2017	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	50,977	101,222
Auto [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	140,151	352,083
2021/2020	321,664	129,738
2020/2019	112,958	184,416
2019/2018	158,726	101,852
2018/2017	83,994	46,273
Prior	42,297	12,146
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	859,790	826,508
Auto [Member] | Performing [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	140,144	351,778
2021/2020	320,921	129,419
2020/2019	112,646	183,959
2019/2018	158,224	101,441
2018/2017	83,689	46,007
Prior	42,089	12,064
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	857,713	824,668
Auto [Member] | Nonperforming [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	7	305
2021/2020	743	319
2020/2019	312	457
2019/2018	502	411
2018/2017	305	266
Prior	208	82
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	2,077	1,840
Other Consumer [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	129,573	427,617
2021/2020	391,570	151,729
2020/2019	138,574	116,700
2019/2018	106,048	78,657
2018/2017	70,121	29,943
Prior	39,411	15,693
Revolving Loans Amortized Cost Basis	19,829	19,029
Revolving Loans Converted to Term	25	22
Total	895,151	839,390
Other Consumer [Member] | Performing [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	129,573	427,401
2021/2020	391,276	151,300
2020/2019	138,270	116,451
2019/2018	105,863	78,523
2018/2017	69,913	29,705
Prior	39,194	15,660
Revolving Loans Amortized Cost Basis	19,828	19,011
Revolving Loans Converted to Term	6	1
Total	893,923	838,052
Other Consumer [Member] | Nonperforming [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	216
2021/2020	294	429
2020/2019	304	249
2019/2018	185	134
2018/2017	208	238
Prior	217	33
Revolving Loans Amortized Cost Basis	1	18
Revolving Loans Converted to Term	19	21
Total	1,228	1,338
Residential [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	72,366	345,338
2021/2020	345,920	228,134
2020/2019	224,734	179,730
2019/2018	172,327	180,647
2018/2017	172,778	148,145
Prior	809,928	696,385
Revolving Loans Amortized Cost Basis	229,888	246,103
Revolving Loans Converted to Term	10,308	11,200
Total	2,038,249	2,035,682
Residential [Member] | Performing [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	72,366	345,338
2021/2020	345,762	226,723
2020/2019	224,010	179,087
2019/2018	172,010	179,575
2018/2017	171,770	146,611
Prior	803,616	687,863
Revolving Loans Amortized Cost Basis	229,871	246,103
Revolving Loans Converted to Term	10,290	11,161
Total	2,029,695	2,022,461
Residential [Member] | Nonperforming [Member]
Credit Quality by Loan Class [Abstract]
2022/2021	0	0
2021/2020	158	1,411
2020/2019	724	643
2019/2018	317	1,072
2018/2017	1,008	1,534
Prior	6,312	8,522
Revolving Loans Amortized Cost Basis	17	0
Revolving Loans Converted to Term	18	39
Total	$ 8,554	$ 13,221