Loans and Allowance for Credit Losses Credit Quality Indicators (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total
Current period gross charge-offs	$ (21,472)	$ (30,952)
Current period recoveries	14,092	17,146
Net loans (charged off) recovered	(7,380)	(13,806)
Portfolio Segment and Loan Class
2021
Total	2,094,526	2,147,375
2020
Total	2,014,166	1,824,121
2019
Total	1,677,176	1,525,318
2018
Total	1,250,572	1,088,270
2017
Total	878,822	1,020,725
Prior
Total	3,649,811	3,445,114
Revolving Loans Amortized Cost Basis
Total	1,624,415	1,382,610
Total
Total	13,190,912	12,436,655
Portfolio Segment and Loan Class | Pass
2021
Total	2,081,160	2,132,067
2020
Total	1,935,863	1,735,785
2019
Total	1,610,405	1,336,686
2018
Total	1,154,994	941,344
2017
Total	831,206	877,443
Prior
Total	3,308,374	3,055,227
Revolving Loans Amortized Cost Basis
Total	1,515,897	1,279,636
Total
Total	12,438,824	11,358,527
Portfolio Segment and Loan Class | Special Mention
2021
Total	11,500	12,546
2020
Total	74,846	70,045
2019
Total	27,059	140,429
2018
Total	41,882	53,781
2017
Total	21,423	59,665
Prior
Total	227,972	199,427
Revolving Loans Amortized Cost Basis
Total	56,995	52,501
Total
Total	461,927	588,489
Portfolio Segment and Loan Class | Substandard or Lower
2021
Total	1,866	2,762
2020
Total	3,457	18,291
2019
Total	39,712	48,203
2018
Total	53,696	93,145
2017
Total	26,193	83,617
Prior
Total	113,465	190,460
Revolving Loans Amortized Cost Basis
Total	51,523	50,473
Total
Total	290,161	489,639
Portfolio Segment and Loan Class | Real estate - construction
2021
Total	159,195	195,873
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2020
Total	390,993	316,586
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2019
Total	247,258	123,229
Current period gross charge-offs	0	(39)
Current period recoveries	0	39
Total net (charge-offs) recoveries	0	0
2018
Total	30,813	104,086
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2017
Total	24,421	35,181
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Prior
Total	119,386	127,657
Current period gross charge-offs	0	0
Current period recoveries	527	1,373
Total net (charge-offs) recoveries	527	1,373
Revolving Loans Amortized Cost Basis
Total	47,474	46,636
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Total
Total	1,019,540	949,248
Current period gross charge-offs	0	(39)
Current period recoveries	574	1,412
Net loans (charged off) recovered	574	1,373
Portfolio Segment and Loan Class | Real estate - construction | Pass
2021
Total	159,195	190,030
2020
Total	390,993	315,811
2019
Total	243,406	113,245
2018
Total	28,539	83,886
2017
Total	24,421	17,545
Prior
Total	93,511	117,157
Revolving Loans Amortized Cost Basis
Total	47,271	46,409
Total
Total	987,336	884,083
Portfolio Segment and Loan Class | Real estate - construction | Special Mention
2021
Total	0	5,843
2020
Total	0	775
2019
Total	0	9,984
2018
Total	0	20,200
2017
Total	0	15,724
Prior
Total	21,603	6,315
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	21,603	58,841
Portfolio Segment and Loan Class | Real estate - construction | Substandard or Lower
2021
Total	0	0
2020
Total	0	0
2019
Total	3,852	0
2018
Total	2,274	0
2017
Total	0	1,912
Prior
Total	4,272	4,185
Revolving Loans Amortized Cost Basis
Total	203	227
Total
Total	10,601	6,324
Portfolio Segment and Loan Class | Commercial and industrial
2021
Total	919,629	862,535
Current period gross charge-offs	0	(2,977)
Current period recoveries	0	6
Total net (charge-offs) recoveries	0	(2,971)
2020
Total	474,042	539,115
Current period gross charge-offs	0	(406)
Current period recoveries	0	39
Total net (charge-offs) recoveries	0	(367)
2019
Total	406,462	449,905
Current period gross charge-offs	(36)	(4,966)
Current period recoveries	30	4,691
Total net (charge-offs) recoveries	(6)	(275)
2018
Total	336,796	265,433
Current period gross charge-offs	0	(208)
Current period recoveries	95	841
Total net (charge-offs) recoveries	95	633
2017
Total	193,395	169,933
Current period gross charge-offs	(21)	(286)
Current period recoveries	379	457
Total net (charge-offs) recoveries	358	171
Prior
Total	651,010	639,967
Current period gross charge-offs	(365)	(800)
Current period recoveries	1,740	2,342
Total net (charge-offs) recoveries	1,375	1,542
Revolving Loans Amortized Cost Basis
Total	1,495,086	1,279,805
Current period gross charge-offs	(1,192)	(5,694)
Current period recoveries	811	1,211
Total net (charge-offs) recoveries	(381)	(4,483)
Total
Total	4,477,537	4,208,327
Current period gross charge-offs	(2,390)	(15,337)
Current period recoveries	5,893	9,587
Net loans (charged off) recovered	3,503	(5,750)
Portfolio Segment and Loan Class | Commercial and industrial | Pass
2021
Total	907,390	855,924
2020
Total	449,145	520,802
2019
Total	397,881	396,575
2018
Total	315,605	232,805
2017
Total	185,096	147,675
Prior
Total	604,352	581,762
Revolving Loans Amortized Cost Basis
Total	1,387,961	1,177,857
Total
Total	4,248,048	3,913,739
Portfolio Segment and Loan Class | Commercial and industrial | Special Mention
2021
Total	11,405	5,386
2020
Total	24,479	8,538
2019
Total	3,763	33,937
2018
Total	8,147	8,301
2017
Total	5,218	10,346
Prior
Total	24,633	23,380
Revolving Loans Amortized Cost Basis
Total	56,048	52,386
Total
Total	133,943	142,369
Portfolio Segment and Loan Class | Commercial and industrial | Substandard or Lower
2021
Total	834	1,225
2020
Total	418	9,775
2019
Total	4,818	19,393
2018
Total	13,044	24,327
2017
Total	3,081	11,912
Prior
Total	22,025	34,825
Revolving Loans Amortized Cost Basis
Total	51,077	49,562
Total
Total	95,546	152,219
Portfolio Segment and Loan Class | Real estate - commercial mortgage
2021
Total	1,015,702	1,088,967
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2020
Total	1,149,131	968,420
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2019
Total	1,023,456	952,184
Current period gross charge-offs	0	(14)
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	(14)
2018
Total	882,963	718,751
Current period gross charge-offs	0	(25)
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	(25)
2017
Total	661,006	815,611
Current period gross charge-offs	0	(6,972)
Current period recoveries	0	983
Total net (charge-offs) recoveries	0	(5,989)
Prior
Total	2,879,415	2,677,490
Current period gross charge-offs	(53)	(1,517)
Current period recoveries	4	1,491
Total net (charge-offs) recoveries	(49)	(26)
Revolving Loans Amortized Cost Basis
Total	81,855	56,169
Current period gross charge-offs	0	(198)
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	(198)
Total
Total	7,693,835	7,279,080
Current period gross charge-offs	(12,473)	(8,726)
Current period recoveries	3,860	2,474
Net loans (charged off) recovered	(8,613)	(6,252)
Portfolio Segment and Loan Class | Real estate - commercial mortgage | Pass
2021
Total	1,014,575	1,086,113
2020
Total	1,095,725	899,172
2019
Total	969,118	826,866
2018
Total	810,850	624,653
2017
Total	621,689	712,223
Prior
Total	2,610,511	2,356,308
Revolving Loans Amortized Cost Basis
Total	80,665	55,370
Total
Total	7,203,440	6,560,705
Portfolio Segment and Loan Class | Real estate - commercial mortgage | Special Mention
2021
Total	95	1,317
2020
Total	50,367	60,732
2019
Total	23,296	96,508
2018
Total	33,735	25,280
2017
Total	16,205	33,595
Prior
Total	181,736	169,732
Revolving Loans Amortized Cost Basis
Total	947	115
Total
Total	306,381	387,279
Portfolio Segment and Loan Class | Real estate - commercial mortgage | Substandard or Lower
2021
Total	1,032	1,537
2020
Total	3,039	8,516
2019
Total	31,042	28,810
2018
Total	38,378	68,818
2017
Total	23,112	69,793
Prior
Total	87,168	151,450
Revolving Loans Amortized Cost Basis
Total	243	684
Total
Total	184,014	331,096
Payment Activity, Aging Status
2021
Total	1,663,147	1,952,466
2020
Total	1,936,748	1,348,730
2019
Total	1,192,235	470,872
2018
Total	374,362	224,975
2017
Total	153,878	272,696
Prior
Total	889,588	632,441
Revolving Loans Amortized Cost Basis
Total	843,948	999,354
Total
Total	7,088,635	5,905,731
Payment Activity, Aging Status | Performing
2021
Total	1,661,656	1,952,344
2020
Total	1,931,346	1,341,876
2019
Total	1,185,464	468,623
2018
Total	367,860	221,500
2017
Total	149,193	253,862
Prior
Total	847,213	605,623
Revolving Loans Amortized Cost Basis
Total	842,226	990,842
Total
Total	7,019,019	5,838,669
Payment Activity, Aging Status | Nonperforming
2021
Total	1,491	122
2020
Total	5,402	6,854
2019
Total	6,771	2,249
2018
Total	6,502	3,475
2017
Total	4,685	18,834
Prior
Total	42,375	26,818
Revolving Loans Amortized Cost Basis
Total	1,722	8,512
Total
Total	69,616	67,062
Payment Activity, Aging Status | Real estate - home equity
2021
Total	416,923	162,563
Current period gross charge-offs	0	(175)
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	(175)
2020
Total	110,022	103,019
Current period gross charge-offs	(587)	(491)
Current period recoveries	44	223
Total net (charge-offs) recoveries	(543)	(268)
2019
Total	80,596	73,829
Current period gross charge-offs	(70)	(496)
Current period recoveries	88	131
Total net (charge-offs) recoveries	18	(365)
2018
Total	52,420	68,615
Current period gross charge-offs	(108)	(238)
Current period recoveries	29	131
Total net (charge-offs) recoveries	(79)	(107)
2017
Total	45,740	33,568
Current period gross charge-offs	(16)	(224)
Current period recoveries	16	167
Total net (charge-offs) recoveries	0	(57)
Prior
Total	217,639	137,760
Current period gross charge-offs	(442)	(411)
Current period recoveries	595	1,048
Total net (charge-offs) recoveries	153	637
Revolving Loans Amortized Cost Basis
Total	843,948	999,354
Current period gross charge-offs	(178)	(1,274)
Current period recoveries	294	645
Total net (charge-offs) recoveries	116	(629)
Total
Total	1,802,017	1,582,905
Current period gross charge-offs	(4,412)	(3,309)
Current period recoveries	2,581	2,345
Net loans (charged off) recovered	(1,831)	(964)
Payment Activity, Aging Status | Real estate - home equity | Performing
2021
Total	416,631	162,441
2020
Total	109,724	102,918
2019
Total	80,422	73,769
2018
Total	52,384	68,564
2017
Total	45,642	33,254
Prior
Total	211,127	135,412
Revolving Loans Amortized Cost Basis
Total	842,226	990,842
Total
Total	1,792,217	1,571,199
Payment Activity, Aging Status | Real estate - home equity | Nonperforming
2021
Total	292	122
2020
Total	298	101
2019
Total	174	60
2018
Total	36	51
2017
Total	98	314
Prior
Total	6,512	2,348
Revolving Loans Amortized Cost Basis
Total	1,722	8,512
Total
Total	9,800	11,706
Payment Activity, Aging Status | Real estate - residential mortgage
2021
Total	935,102	1,548,174
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2020
Total	1,713,807	1,140,355
Current period gross charge-offs	0	(626)
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	(626)
2019
Total	1,060,723	346,814
Current period gross charge-offs	0	(148)
Current period recoveries	4	1
Total net (charge-offs) recoveries	4	(147)
2018
Total	292,633	117,225
Current period gross charge-offs	0	(125)
Current period recoveries	0	18
Total net (charge-offs) recoveries	0	(107)
2017
Total	92,042	201,008
Current period gross charge-offs	0	(4)
Current period recoveries	27	0
Total net (charge-offs) recoveries	27	(4)
Prior
Total	642,972	493,174
Current period gross charge-offs	0	(387)
Current period recoveries	261	264
Total net (charge-offs) recoveries	261	(123)
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	0	92
Total net (charge-offs) recoveries	0	92
Total
Total	4,737,279	3,846,750
Current period gross charge-offs	(66)	(1,290)
Current period recoveries	425	375
Net loans (charged off) recovered	359	(915)
Payment Activity, Aging Status | Real estate - residential mortgage | Performing
2021
Total	933,903	1,548,174
2020
Total	1,708,703	1,133,602
2019
Total	1,054,126	344,625
2018
Total	286,167	113,801
2017
Total	87,455	198,164
Prior
Total	620,416	468,842
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	4,690,770	3,807,208
Payment Activity, Aging Status | Real estate - residential mortgage | Nonperforming
2021
Total	1,199	0
2020
Total	5,104	6,753
2019
Total	6,597	2,189
2018
Total	6,466	3,424
2017
Total	4,587	2,844
Prior
Total	22,556	24,332
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	46,509	39,542
Payment Activity, Aging Status | Equipment Finance Leasing and Other
2021
Total	146,198	97,077
Current period gross charge-offs	(506)	(975)
Current period recoveries	63	255
Total net (charge-offs) recoveries	(443)	(720)
2020
Total	39,427	65,316
Current period gross charge-offs	(167)	(1,276)
Current period recoveries	18	539
Total net (charge-offs) recoveries	(149)	(737)
2019
Total	40,024	49,591
Current period gross charge-offs	(140)	0
Current period recoveries	82	88
Total net (charge-offs) recoveries	(58)	88
2018
Total	29,309	34,107
Current period gross charge-offs	(80)	0
Current period recoveries	25	10
Total net (charge-offs) recoveries	(55)	10
2017
Total	15,019	37,947
Current period gross charge-offs	(47)	0
Current period recoveries	10	18
Total net (charge-offs) recoveries	(37)	18
Prior
Total	28,977	1,507
Current period gross charge-offs	(1,191)	0
Current period recoveries	268	43
Total net (charge-offs) recoveries	(923)	43
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Total
Total	298,954	285,545
Current period gross charge-offs	(2,131)	(2,251)
Current period recoveries	759	953
Net loans (charged off) recovered	(1,372)	(1,298)
Payment Activity, Aging Status | Equipment Finance Leasing and Other | Performing
2021
Total	146,198	97,077
2020
Total	39,427	65,316
2019
Total	40,024	49,591
2018
Total	29,309	34,107
2017
Total	15,019	22,444
Prior
Total	15,670	1,369
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	285,647	269,904
Payment Activity, Aging Status | Equipment Finance Leasing and Other | Nonperforming
2021
Total	0	0
2020
Total	0	0
2019
Total	0	0
2018
Total	0	0
2017
Total	0	15,503
Prior
Total	13,307	138
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	13,307	15,641
Payment Activity, Aging Status | Construction - other
2021
Total	164,924	144,652
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2020
Total	73,492	40,040
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2019
Total	10,892	638
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2018
Total	0	5,028
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
2017
Total	1,077	173
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Prior
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Total
Total	250,385	190,531
Current period gross charge-offs	0	0
Current period recoveries	0	0
Net loans (charged off) recovered	0	0
Payment Activity, Aging Status | Construction - other | Performing
2021
Total	164,924	144,652
2020
Total	73,492	40,040
2019
Total	10,892	638
2018
Total	0	5,028
2017
Total	1,077	0
Prior
Total	0	0
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	250,385	190,358
Payment Activity, Aging Status | Construction - other | Nonperforming
2021
Total	0	0
2020
Total	0	0
2019
Total	0	0
2018
Total	0	0
2017
Total	0	173
Prior
Total	0	0
Revolving Loans Amortized Cost Basis
Total	0	0
Total
Total	0	173
Conversion to Term Loan | Portfolio Segment and Loan Class
Revolving Loans Amortized Cost Basis
Total	1,424	3,122
Conversion to Term Loan | Portfolio Segment and Loan Class | Pass
Revolving Loans Amortized Cost Basis
Total	925	339
Conversion to Term Loan | Portfolio Segment and Loan Class | Special Mention
Revolving Loans Amortized Cost Basis
Total	250	95
Conversion to Term Loan | Portfolio Segment and Loan Class | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	249	2,688
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - construction
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	47	0
Total net (charge-offs) recoveries	47	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - construction | Pass
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - construction | Special Mention
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - construction | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Commercial and industrial
Revolving Loans Amortized Cost Basis
Total	1,117	1,634
Current period gross charge-offs	(776)	0
Current period recoveries	2,838	0
Total net (charge-offs) recoveries	2,062	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Commercial and industrial | Pass
Revolving Loans Amortized Cost Basis
Total	618	339
Conversion to Term Loan | Portfolio Segment and Loan Class | Commercial and industrial | Special Mention
Revolving Loans Amortized Cost Basis
Total	250	95
Conversion to Term Loan | Portfolio Segment and Loan Class | Commercial and industrial | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	249	1,200
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - commercial mortgage
Revolving Loans Amortized Cost Basis
Total	307	1,488
Current period gross charge-offs	(12,420)	0
Current period recoveries	3,856	0
Total net (charge-offs) recoveries	(8,564)	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - commercial mortgage | Pass
Revolving Loans Amortized Cost Basis
Total	307	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - commercial mortgage | Special Mention
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Portfolio Segment and Loan Class | Real estate - commercial mortgage | Substandard or Lower
Revolving Loans Amortized Cost Basis
Total	0	1,488
Conversion to Term Loan | Payment Activity, Aging Status
Revolving Loans Amortized Cost Basis
Total	34,729	4,197
Conversion to Term Loan | Payment Activity, Aging Status | Performing
Revolving Loans Amortized Cost Basis
Total	34,061	3,999
Conversion to Term Loan | Payment Activity, Aging Status | Nonperforming
Revolving Loans Amortized Cost Basis
Total	668	198
Conversion to Term Loan | Payment Activity, Aging Status | Real estate - home equity
Revolving Loans Amortized Cost Basis
Total	34,729	4,197
Current period gross charge-offs	(3,011)	0
Current period recoveries	1,515	0
Total net (charge-offs) recoveries	(1,496)	0
Conversion to Term Loan | Payment Activity, Aging Status | Real estate - home equity | Performing
Revolving Loans Amortized Cost Basis
Total	34,061	3,999
Conversion to Term Loan | Payment Activity, Aging Status | Real estate - home equity | Nonperforming
Revolving Loans Amortized Cost Basis
Total	668	198
Conversion to Term Loan | Payment Activity, Aging Status | Real estate - residential mortgage
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	(66)	0
Current period recoveries	133	0
Total net (charge-offs) recoveries	67	0
Conversion to Term Loan | Payment Activity, Aging Status | Real estate - residential mortgage | Performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Payment Activity, Aging Status | Real estate - residential mortgage | Nonperforming
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Payment Activity, Aging Status | Equipment Finance Leasing and Other
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	293	0
Total net (charge-offs) recoveries	293	0
Conversion to Term Loan | Payment Activity, Aging Status | Equipment Finance Leasing and Other | Performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Payment Activity, Aging Status | Equipment Finance Leasing and Other | Nonperforming
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Payment Activity, Aging Status | Construction - other
Revolving Loans Amortized Cost Basis
Total	0	0
Current period gross charge-offs	0	0
Current period recoveries	0	0
Total net (charge-offs) recoveries	0	0
Conversion to Term Loan | Payment Activity, Aging Status | Construction - other | Performing
Revolving Loans Amortized Cost Basis
Total	0	0
Conversion to Term Loan | Payment Activity, Aging Status | Construction - other | Nonperforming
Revolving Loans Amortized Cost Basis
Total	$ 0	$ 0