Allowance for Credit Losses and Credit Quality Information - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	$ 7,882,055	$ 9,014,677	$ 8,464,562
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	605,339	1,336,436
Year two, originated, fiscal year before current fiscal year	436,055	535,401
Year three, originated, two years before current fiscal year	386,061	383,110
Year four, originated, three years before current fiscal year	303,448	216,287
Year five, originated, four years before current fiscal year	159,343	114,764
Prior	171,029	177,504
Revolving loans amortized cost basis	5,580	6,245
Revolving loans converted to term	203,464	179,556
Total Loans	2,270,319	2,949,303	2,235,428
Gross loans	1,918,043	2,700,418
Commercial | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	556,896	1,250,528
Year two, originated, fiscal year before current fiscal year	420,698	448,704
Year three, originated, two years before current fiscal year	329,354	296,594
Year four, originated, three years before current fiscal year	273,345	157,359
Year five, originated, four years before current fiscal year	139,800	97,036
Prior	148,809	125,361
Revolving loans amortized cost basis	5,551	6,182
Revolving loans converted to term	176,006	136,110
Total Loans	2,050,459	2,517,874
Commercial | Commercial and industrial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	35,910	3,040
Year two, originated, fiscal year before current fiscal year	949	26,470
Year three, originated, two years before current fiscal year	3,052	28,636
Year four, originated, three years before current fiscal year	1,057	8,482
Year five, originated, four years before current fiscal year	429	2,577
Prior	15,299	16,993
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	17,545	34,403
Total Loans	74,241	120,601
Commercial | Commercial and industrial | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	12,533	82,868
Year two, originated, fiscal year before current fiscal year	14,408	60,227
Year three, originated, two years before current fiscal year	53,655	57,880
Year four, originated, three years before current fiscal year	29,046	50,446
Year five, originated, four years before current fiscal year	19,114	15,151
Prior	6,921	35,150
Revolving loans amortized cost basis	29	63
Revolving loans converted to term	9,913	9,043
Total Loans	145,619	310,828
Commercial | Owner-occupied commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	309,286	225,393
Year two, originated, fiscal year before current fiscal year	208,223	245,077
Year three, originated, two years before current fiscal year	179,202	107,625
Year four, originated, three years before current fiscal year	77,835	173,364
Year five, originated, four years before current fiscal year	142,277	139,603
Prior	280,687	292,414
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	144,197	149,251
Total Loans	1,341,707	1,332,727	1,296,466
Gross loans	1,341,707	1,332,727
Commercial | Owner-occupied commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	305,156	220,165
Year two, originated, fiscal year before current fiscal year	189,128	225,766
Year three, originated, two years before current fiscal year	172,503	90,515
Year four, originated, three years before current fiscal year	67,526	135,903
Year five, originated, four years before current fiscal year	136,697	123,897
Prior	262,629	271,086
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	128,188	123,194
Total Loans	1,261,827	1,190,526
Commercial | Owner-occupied commercial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	938	1,525
Year two, originated, fiscal year before current fiscal year	5,359	5,885
Year three, originated, two years before current fiscal year	2,561	1,838
Year four, originated, three years before current fiscal year	891	17,578
Year five, originated, four years before current fiscal year	0	4,125
Prior	7,019	1,997
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	10,543	14,467
Total Loans	27,311	47,415
Commercial | Owner-occupied commercial | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	3,192	3,703
Year two, originated, fiscal year before current fiscal year	13,736	13,426
Year three, originated, two years before current fiscal year	4,138	15,272
Year four, originated, three years before current fiscal year	9,418	19,883
Year five, originated, four years before current fiscal year	5,580	11,581
Prior	11,039	19,331
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	5,466	11,590
Total Loans	52,569	94,786
Commercial | Commercial mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	418,587	414,259
Year two, originated, fiscal year before current fiscal year	286,698	310,180
Year three, originated, two years before current fiscal year	221,100	264,939
Year four, originated, three years before current fiscal year	137,452	281,028
Year five, originated, four years before current fiscal year	243,705	259,296
Prior	383,997	406,280
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	189,971	150,080
Total Loans	1,881,510	2,086,062	2,222,976
Gross loans	1,881,510	2,086,062
Commercial | Commercial mortgages | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	416,149	379,592
Year two, originated, fiscal year before current fiscal year	280,889	283,004
Year three, originated, two years before current fiscal year	217,311	240,924
Year four, originated, three years before current fiscal year	134,477	257,809
Year five, originated, four years before current fiscal year	229,863	254,780
Prior	368,527	375,473
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	187,396	148,210
Total Loans	1,834,612	1,939,792
Commercial | Commercial mortgages | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	8,324
Year two, originated, fiscal year before current fiscal year	4,185	1,774
Year three, originated, two years before current fiscal year	0	21,762
Year four, originated, three years before current fiscal year	861	21,269
Year five, originated, four years before current fiscal year	11,588	1,274
Prior	1,385	6,507
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	2,097	1,870
Total Loans	20,116	62,780
Commercial | Commercial mortgages | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	2,438	26,343
Year two, originated, fiscal year before current fiscal year	1,624	25,402
Year three, originated, two years before current fiscal year	3,789	2,253
Year four, originated, three years before current fiscal year	2,114	1,950
Year five, originated, four years before current fiscal year	2,254	3,242
Prior	14,085	24,300
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	478	0
Total Loans	26,782	83,490
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	260,975	189,257
Year two, originated, fiscal year before current fiscal year	195,269	223,604
Year three, originated, two years before current fiscal year	87,290	208,981
Year four, originated, three years before current fiscal year	39,585	14,929
Year five, originated, four years before current fiscal year	2,313	7,414
Prior	11,297	3,724
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	90,484	68,366
Total Loans	687,213	716,275	581,082
Gross loans	687,213	716,275
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	248,053	189,257
Year two, originated, fiscal year before current fiscal year	195,269	214,956
Year three, originated, two years before current fiscal year	84,868	208,981
Year four, originated, three years before current fiscal year	39,585	11,414
Year five, originated, four years before current fiscal year	2,223	7,414
Prior	11,297	3,645
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	88,839	66,018
Total Loans	670,134	701,685
Commercial | Construction | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	3,515
Year five, originated, four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	0	3,515
Commercial | Construction | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	12,922	0
Year two, originated, fiscal year before current fiscal year	0	8,648
Year three, originated, two years before current fiscal year	2,422	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	90	0
Prior	0	79
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	1,645	2,348
Total Loans	17,079	11,075
Commercial | Paycheck Protection Program, CARES Act
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	31,500	751,200
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	59,977	42,588
Year two, originated, fiscal year before current fiscal year	28,538	26,309
Year three, originated, two years before current fiscal year	13,570	71,410
Year four, originated, three years before current fiscal year	32,871	85,277
Year five, originated, four years before current fiscal year	45,032	149,926
Prior	362,745	388,883
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	542,733	764,393	999,879
Gross loans	546,667	774,455
Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	59,977	42,475
Year two, originated, fiscal year before current fiscal year	28,426	26,309
Year three, originated, two years before current fiscal year	12,526	71,410
Year four, originated, three years before current fiscal year	32,871	85,277
Year five, originated, four years before current fiscal year	44,969	149,643
Prior	358,964	383,358
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	537,733	758,472
Residential | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	113
Year two, originated, fiscal year before current fiscal year	112	0
Year three, originated, two years before current fiscal year	1,044	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	63	283
Prior	3,781	5,525
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	5,000	5,921
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	219,918	235,948
Year two, originated, fiscal year before current fiscal year	170,069	134,064
Year three, originated, two years before current fiscal year	74,048	251,723
Year four, originated, three years before current fiscal year	204,119	63,945
Year five, originated, four years before current fiscal year	39,184	44,700
Prior	60,952	53,717
Revolving loans amortized cost basis	384,373	373,238
Revolving loans converted to term	5,910	8,582
Total Loans	1,158,573	1,165,917	$ 1,128,731
Gross loans	1,158,573	1,165,917
Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	219,918	235,948
Year two, originated, fiscal year before current fiscal year	169,922	134,064
Year three, originated, two years before current fiscal year	74,048	251,087
Year four, originated, three years before current fiscal year	203,519	63,713
Year five, originated, four years before current fiscal year	39,113	44,700
Prior	60,952	53,717
Revolving loans amortized cost basis	382,718	371,842
Revolving loans converted to term	5,364	8,287
Total Loans	1,155,554	1,163,358
Consumer | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	147	0
Year three, originated, two years before current fiscal year	0	636
Year four, originated, three years before current fiscal year	600	232
Year five, originated, four years before current fiscal year	71	0
Prior	0	0
Revolving loans amortized cost basis	1,655	1,396
Revolving loans converted to term	546	295
Total Loans	$ 3,019	$ 2,559