Loans and Allowance for Credit Losses for Loans - Internal Loan Classification Risk by Loan Portfolio Class by Origination Year (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 48,799,711	$ 50,210,295
Gross loan charge-offs
Total	215,112	75,453
Commercial and Industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	1,824,953	1,579,982
Year two, fiscal year before current fiscal year	854,030	1,123,368
Year three, two years before current fiscal year	772,815	784,426
Year four, three years before current fiscal year	492,961	379,097
Year five, four years before current fiscal year	250,075	217,248
More than five years before current fiscal year	524,794	588,062
Revolving Loans Amortized Cost Basis	5,155,993	4,524,198
Revolving Loans Converted to Term Loans	55,779	34,162
Loans	9,931,400	9,230,543
Gross loan charge-offs
Total	68,299	48,015
Commercial and Industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	1,769,585	1,494,417
Year two, fiscal year before current fiscal year	828,087	1,047,513
Year three, two years before current fiscal year	703,962	765,335
Year four, three years before current fiscal year	476,091	377,047
Year five, four years before current fiscal year	246,992	211,504
More than five years before current fiscal year	392,834	523,430
Revolving Loans Amortized Cost Basis	4,804,095	4,382,361
Revolving Loans Converted to Term Loans	6,006	29,798
Loans	9,227,652	8,831,405
Commercial and Industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	30,755	70,807
Year two, fiscal year before current fiscal year	3,553	73,423
Year three, two years before current fiscal year	59,434	15,296
Year four, three years before current fiscal year	11,646	358
Year five, four years before current fiscal year	270	1,870
More than five years before current fiscal year	72,514	915
Revolving Loans Amortized Cost Basis	147,254	99,981
Revolving Loans Converted to Term Loans	10,762	139
Loans	336,188	262,789
Commercial and Industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	24,613	3,100
Year two, fiscal year before current fiscal year	13,479	1,837
Year three, two years before current fiscal year	9,415	2,629
Year four, three years before current fiscal year	4,296	1,714
Year five, four years before current fiscal year	2,813	1,221
More than five years before current fiscal year	7,382	5,900
Revolving Loans Amortized Cost Basis	201,053	29,569
Revolving Loans Converted to Term Loans	39,011	4,225
Loans	302,062	50,195
Commercial and Industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0	11,658
Year two, fiscal year before current fiscal year	8,911	595
Year three, two years before current fiscal year	4	1,166
Year four, three years before current fiscal year	928	(22)
Year five, four years before current fiscal year	0	2,653
More than five years before current fiscal year	52,064	57,817
Revolving Loans Amortized Cost Basis	3,591	12,287
Revolving Loans Converted to Term Loans	0	0
Loans	65,498	86,154
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	29,644,958	31,970,047
Gross loan charge-offs
Total	138,495	22,946
Commercial real estate | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	2,338,118	4,272,246
Year two, fiscal year before current fiscal year	3,433,126	6,738,948
Year three, two years before current fiscal year	5,988,114	5,052,212
Year four, three years before current fiscal year	4,400,609	3,022,501
Year five, four years before current fiscal year	2,604,959	2,469,773
More than five years before current fiscal year	6,937,081	5,957,963
Revolving Loans Amortized Cost Basis	749,597	622,497
Revolving Loans Converted to Term Loans	78,621	107,099
Loans	26,530,225	28,243,239
Commercial real estate | Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	2,097,314	4,088,835
Year two, fiscal year before current fiscal year	2,941,270	6,630,322
Year three, two years before current fiscal year	5,310,807	4,791,190
Year four, three years before current fiscal year	3,883,333	2,789,275
Year five, four years before current fiscal year	2,302,480	2,329,385
More than five years before current fiscal year	6,086,608	5,385,809
Revolving Loans Amortized Cost Basis	597,266	618,056
Revolving Loans Converted to Term Loans	78,621	104,839
Loans	23,297,699	26,737,711
Commercial real estate | Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	156,394	125,296
Year two, fiscal year before current fiscal year	380,852	82,917
Year three, two years before current fiscal year	289,669	248,900
Year four, three years before current fiscal year	192,614	184,720
Year five, four years before current fiscal year	55,739	69,949
More than five years before current fiscal year	327,732	358,059
Revolving Loans Amortized Cost Basis	141,164	26
Revolving Loans Converted to Term Loans	0	183
Loans	1,544,164	1,070,050
Commercial real estate | Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	84,410	58,115
Year two, fiscal year before current fiscal year	107,944	25,709
Year three, two years before current fiscal year	387,638	12,122
Year four, three years before current fiscal year	288,906	48,506
Year five, four years before current fiscal year	236,927	70,439
More than five years before current fiscal year	520,858	214,095
Revolving Loans Amortized Cost Basis	11,167	4,415
Revolving Loans Converted to Term Loans	0	2,077
Loans	1,637,850	435,478
Commercial real estate | Commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0
Year two, fiscal year before current fiscal year	3,060
Year three, two years before current fiscal year	0
Year four, three years before current fiscal year	35,756
Year five, four years before current fiscal year	9,813
More than five years before current fiscal year	1,883
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans	0
Loans	50,512
Commercial real estate | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	568,710	760,480
Year two, fiscal year before current fiscal year	680,260	675,097
Year three, two years before current fiscal year	346,587	276,612
Year four, three years before current fiscal year	102,776	10,318
Year five, four years before current fiscal year	25,228	40,584
More than five years before current fiscal year	47,665	61,228
Revolving Loans Amortized Cost Basis	1,284,863	1,762,890
Revolving Loans Converted to Term Loans	58,644	139,599
Loans	3,114,733	3,726,808
Commercial real estate | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	545,597	753,759
Year two, fiscal year before current fiscal year	680,260	655,198
Year three, two years before current fiscal year	334,899	267,336
Year four, three years before current fiscal year	92,765	10,318
Year five, four years before current fiscal year	17,955	40,584
More than five years before current fiscal year	45,161	43,560
Revolving Loans Amortized Cost Basis	1,224,698	1,762,890
Revolving Loans Converted to Term Loans	58,644	139,599
Loans	2,999,979	3,673,244
Commercial real estate | Construction | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	13,278
Year two, fiscal year before current fiscal year	0
Year three, two years before current fiscal year	664
Year four, three years before current fiscal year	5,069
Year five, four years before current fiscal year	0
More than five years before current fiscal year	2,504
Revolving Loans Amortized Cost Basis	16,691
Revolving Loans Converted to Term Loans	0
Loans	38,206
Commercial real estate | Construction | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	9,835	6,721
Year two, fiscal year before current fiscal year	0	0
Year three, two years before current fiscal year	8,950	9,276
Year four, three years before current fiscal year	4,942	0
Year five, four years before current fiscal year	0	0
More than five years before current fiscal year	0	17,668
Revolving Loans Amortized Cost Basis	43,474	0
Revolving Loans Converted to Term Loans	0	0
Loans	67,201	33,665
Commercial real estate | Construction | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, current fiscal year	0	0
Year two, fiscal year before current fiscal year	0	19,899
Year three, two years before current fiscal year	2,074	0
Year four, three years before current fiscal year	0	0
Year five, four years before current fiscal year	7,273	0
More than five years before current fiscal year	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term Loans	0	0
Loans	9,347	19,899
Commercial and Industrial and Commercial Real Estate
Gross loan charge-offs
Year one, gross loan charge-offs	706	307
Year two, gross loan charge-offs	31,809	12,919
Year three, gross loan charge-offs	7,523	28,438
Year four, gross loan charge-offs	44,610	6,946
Year five, gross loan charge-offs	66,632	5,031
More than five years gross loan charge-offs	49,436	13,446
Revolving Loans Amortized Cost Basis	3,930	3,729
Revolving Loans Converted to Term Loans	2,148	145
Total	$ 206,794	$ 70,961