Loans and Allowance for Credit Losses for Loans - Internal Loan Classification Risk by Loan Portfolio Class by Origination Year (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 46,917,200	$ 34,153,657
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	1,633,478	1,575,480
Year two, fiscal year before current fiscal year	1,115,331	749,183
Year three, two years before current fiscal year	614,019	470,111
Year four, three years before current fiscal year	331,400	383,968
Year five, four years before current fiscal year	258,656	162,744
More than five years before current fiscal year	458,680	415,369
Revolving Loans Amortized Cost Basis	4,393,115	2,090,300
Revolving Loans Converted to Term Loans	151	396
Total	8,804,830	5,847,551
Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	1,600,747	1,563,050
Year two, fiscal year before current fiscal year	1,089,386	743,165
Year three, two years before current fiscal year	590,406	461,022
Year four, three years before current fiscal year	322,564	362,748
Year five, four years before current fiscal year	250,031	143,753
More than five years before current fiscal year	386,085	337,713
Revolving Loans Amortized Cost Basis	4,307,163	1,968,513
Revolving Loans Converted to Term Loans	144	247
Total	8,546,526	5,580,211
Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	31,557	4,182
Year two, fiscal year before current fiscal year	3,367	1,195
Year three, two years before current fiscal year	19,492	3,217
Year four, three years before current fiscal year	4,732	14,143
Year five, four years before current fiscal year	4,369	1,726
More than five years before current fiscal year	3,558	9,869
Revolving Loans Amortized Cost Basis	51,021	102,145
Revolving Loans Converted to Term Loans	7	40
Total	118,103	136,517
Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	288	8,248
Year two, fiscal year before current fiscal year	1,734	4,823
Year three, two years before current fiscal year	4,121	3,139
Year four, three years before current fiscal year	1,412	7,077
Year five, four years before current fiscal year	4,256	910
More than five years before current fiscal year	4,879	408
Revolving Loans Amortized Cost Basis	31,698	19,642
Revolving Loans Converted to Term Loans	0	109
Total	48,388	44,356
Commercial and industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	886	0
Year two, fiscal year before current fiscal year	20,844	0
Year three, two years before current fiscal year	0	2,733
Year four, three years before current fiscal year	2,692	0
Year five, four years before current fiscal year	0	16,355
More than five years before current fiscal year	64,158	67,379
Revolving Loans Amortized Cost Basis	3,233	0
Revolving Loans Converted to Term Loans	0	0
Total	91,813	86,467
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total	29,432,868	20,790,066
Commercial real estate | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	6,923,489	4,526,352
Year two, fiscal year before current fiscal year	5,250,609	3,067,814
Year three, two years before current fiscal year	3,339,684	2,778,520
Year four, three years before current fiscal year	2,752,292	1,820,340
Year five, four years before current fiscal year	1,657,775	1,611,334
More than five years before current fiscal year	5,336,045	4,869,778
Revolving Loans Amortized Cost Basis	468,635	247,968
Revolving Loans Converted to Term Loans	3,504	13,380
Total	25,732,033	18,935,486
Commercial real estate | Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	6,815,115	4,517,917
Year two, fiscal year before current fiscal year	5,168,127	2,983,140
Year three, two years before current fiscal year	3,246,885	2,702,580
Year four, three years before current fiscal year	2,672,223	1,734,922
Year five, four years before current fiscal year	1,536,327	1,474,770
More than five years before current fiscal year	5,027,128	4,557,011
Revolving Loans Amortized Cost Basis	452,461	195,851
Revolving Loans Converted to Term Loans	3,504	13,380
Total	24,921,770	18,179,571
Commercial real estate | Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	93,286	7,700
Year two, fiscal year before current fiscal year	48,007	50,019
Year three, two years before current fiscal year	60,169	46,911
Year four, three years before current fiscal year	45,447	44,187
Year five, four years before current fiscal year	62,111	65,623
More than five years before current fiscal year	125,414	143,540
Revolving Loans Amortized Cost Basis	8,188	50,168
Revolving Loans Converted to Term Loans	0	0
Total	442,622	408,148
Commercial real estate | Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	15,088	735
Year two, fiscal year before current fiscal year	34,475	34,655
Year three, two years before current fiscal year	32,630	29,029
Year four, three years before current fiscal year	34,622	41,231
Year five, four years before current fiscal year	59,337	70,941
More than five years before current fiscal year	183,341	169,041
Revolving Loans Amortized Cost Basis	7,986	1,949
Revolving Loans Converted to Term Loans	0	0
Total	367,479	347,581
Commercial real estate | Commercial real estate | Doubtful
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	162	186
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans	0	0
Total	162	186
Commercial real estate | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	955,349	278,427
Year two, fiscal year before current fiscal year	524,647	98,628
Year three, two years before current fiscal year	61,131	49,570
Year four, three years before current fiscal year	23,819	33,027
Year five, four years before current fiscal year	8,676	6,061
More than five years before current fiscal year	51,941	46,261
Revolving Loans Amortized Cost Basis	2,075,272	1,342,606
Revolving Loans Converted to Term Loans	0	0
Total	3,700,835	1,854,580
Commercial real estate | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	942,380	274,097
Year two, fiscal year before current fiscal year	512,046	98,609
Year three, two years before current fiscal year	61,131	48,555
Year four, three years before current fiscal year	22,845	32,781
Year five, four years before current fiscal year	8,676	6,061
More than five years before current fiscal year	20,599	28,419
Revolving Loans Amortized Cost Basis	2,040,866	1,313,555
Revolving Loans Converted to Term Loans	0	0
Total	3,608,543	1,802,077
Commercial real estate | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0	4,131
Year two, fiscal year before current fiscal year	0	0
Year three, two years before current fiscal year	0	1,009
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	14,268	18,449
Revolving Loans Converted to Term Loans	0	0
Total	14,268	23,589
Commercial real estate | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	12,969	199
Year two, fiscal year before current fiscal year	12,601	19
Year three, two years before current fiscal year	0	6
Year four, three years before current fiscal year	974	246
Year five, four years before current fiscal year	0	0
More than five years before current fiscal year	17,599	17,842
Revolving Loans Amortized Cost Basis	20,138	10,602
Revolving Loans Converted to Term Loans	0	0
Total	64,281	$ 28,914
Commercial real estate | Construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0
Year two, fiscal year before current fiscal year	0
Year three, two years before current fiscal year	0
Year four, three years before current fiscal year	0
Year five, four years before current fiscal year	0
More than five years before current fiscal year	13,743
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans	0
Total	$ 13,743