Loans and Allowance for Credit Losses for Loans - Amortized Cost In Those Loan Classes Based on Payment Activity by Origination Year (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 45,185,764	$ 34,153,657
90 Days or More Past Due Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	31,125	2,771
Residential mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	1,040,542	1,448,602
Year two, fiscal year before current fiscal year	1,508,300	635,888
Year three, two years before current fiscal year	586,547	575,538
Year four, three years before current fiscal year	507,010	427,208
Year five, four years before current fiscal year	354,105	370,958
More than five years before current fiscal year	1,116,930	1,016,528
Revolving Loans Amortized Cost Basis	63,694	70,342
Revolving Loans Converted to Term Loans	0	0
Total	5,177,128	4,545,064
Residential mortgage | 90 Days or More Past Due Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	550	677
Residential mortgage | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	1,040,542	1,448,602
Year two, fiscal year before current fiscal year	1,508,300	635,531
Year three, two years before current fiscal year	586,418	572,911
Year four, three years before current fiscal year	505,502	425,152
Year five, four years before current fiscal year	351,579	368,164
More than five years before current fiscal year	1,113,157	1,014,190
Revolving Loans Amortized Cost Basis	63,694	70,342
Revolving Loans Converted to Term Loans	0	0
Total	5,169,192	4,534,892
Residential mortgage | Non-Performing Loans | 90 Days or More Past Due Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0	0
Year two, fiscal year before current fiscal year	0	357
Year three, two years before current fiscal year	129	2,627
Year four, three years before current fiscal year	1,508	2,056
Year five, four years before current fiscal year	2,526	2,794
More than five years before current fiscal year	3,773	2,338
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans	0	0
Total	7,936	10,172
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	646,731	752,371
Year two, fiscal year before current fiscal year	586,376	322,296
Year three, two years before current fiscal year	238,976	292,368
Year four, three years before current fiscal year	201,663	172,014
Year five, four years before current fiscal year	109,312	79,202
More than five years before current fiscal year	71,268	43,367
Revolving Loans Amortized Cost Basis	1,348,020	1,265,942
Revolving Loans Converted to Term Loans	39,650	43,416
Total	3,241,996	2,970,976
Consumer | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	36,133	13,847
Year two, fiscal year before current fiscal year	12,728	5,723
Year three, two years before current fiscal year	4,788	6,994
Year four, three years before current fiscal year	5,279	7,384
Year five, four years before current fiscal year	5,822	5,359
More than five years before current fiscal year	15,602	13,632
Revolving Loans Amortized Cost Basis	347,133	304,424
Revolving Loans Converted to Term Loans	39,650	43,416
Total	467,135	400,779
Consumer | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	589,488	735,575
Year two, fiscal year before current fiscal year	570,714	309,856
Year three, two years before current fiscal year	226,926	278,906
Year four, three years before current fiscal year	188,908	157,613
Year five, four years before current fiscal year	95,930	72,834
More than five years before current fiscal year	39,120	15,252
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans	0	0
Total	1,711,086	1,570,036
Consumer | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	21,110	2,949
Year two, fiscal year before current fiscal year	2,934	6,717
Year three, two years before current fiscal year	7,262	6,468
Year four, three years before current fiscal year	7,476	7,017
Year five, four years before current fiscal year	7,560	1,009
More than five years before current fiscal year	16,546	14,483
Revolving Loans Amortized Cost Basis	1,000,887	961,518
Revolving Loans Converted to Term Loans	0	0
Total	1,063,775	1,000,161
Consumer | 90 Days or More Past Due Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total	421	789
Consumer | 90 Days or More Past Due Loans | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total	312	0
Consumer | 90 Days or More Past Due Loans | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Total	109	271
Consumer | 90 Days or More Past Due Loans | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total	0	518
Consumer | Performing | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	36,133	13,847
Year two, fiscal year before current fiscal year	12,728	5,723
Year three, two years before current fiscal year	4,788	6,994
Year four, three years before current fiscal year	5,279	7,384
Year five, four years before current fiscal year	5,822	5,359
More than five years before current fiscal year	15,602	13,597
Revolving Loans Amortized Cost Basis	346,709	303,888
Revolving Loans Converted to Term Loans	39,105	42,822
Total	466,166	399,614
Consumer | Performing | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	589,413	735,446
Year two, fiscal year before current fiscal year	570,603	309,856
Year three, two years before current fiscal year	226,848	278,828
Year four, three years before current fiscal year	188,741	157,450
Year five, four years before current fiscal year	95,798	72,753
More than five years before current fiscal year	39,039	15,171
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans	0	0
Total	1,710,442	1,569,504
Consumer | Performing | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	21,110	2,949
Year two, fiscal year before current fiscal year	2,934	6,717
Year three, two years before current fiscal year	7,262	6,468
Year four, three years before current fiscal year	7,476	7,017
Year five, four years before current fiscal year	7,560	1,009
More than five years before current fiscal year	16,546	14,483
Revolving Loans Amortized Cost Basis	1,000,795	961,027
Revolving Loans Converted to Term Loans	0	0
Total	1,063,683	999,670
Consumer | Non-Performing Loans | 90 Days or More Past Due Loans | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0	0
Year two, fiscal year before current fiscal year	0	0
Year three, two years before current fiscal year	0	0
Year four, three years before current fiscal year	0	0
Year five, four years before current fiscal year	0	0
More than five years before current fiscal year	0	35
Revolving Loans Amortized Cost Basis	424	536
Revolving Loans Converted to Term Loans	545	594
Total	969	1,165
Consumer | Non-Performing Loans | 90 Days or More Past Due Loans | Automobile
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	75	129
Year two, fiscal year before current fiscal year	111	0
Year three, two years before current fiscal year	78	78
Year four, three years before current fiscal year	167	163
Year five, four years before current fiscal year	132	81
More than five years before current fiscal year	81	81
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans	0	0
Total	644	532
Consumer | Non-Performing Loans | 90 Days or More Past Due Loans | Other consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0	0
Year two, fiscal year before current fiscal year	0	0
Year three, two years before current fiscal year	0	0
Year four, three years before current fiscal year	0	0
Year five, four years before current fiscal year	0	0
More than five years before current fiscal year	0	0
Revolving Loans Amortized Cost Basis	92	491
Revolving Loans Converted to Term Loans	0	0
Total	$ 92	$ 491