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Loans - Aging of Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 18,975,248	$ 19,047,039
Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	18,777,733	18,871,309
Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	197,515	175,730
30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	68,597	89,162
90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,779	288
Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	18,706,357	18,781,859
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,895,477	2,818,326
Commercial and industrial | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,849,365	2,790,433
Commercial and industrial | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	46,112	27,893
Commercial and industrial | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,950	6,580
Commercial and industrial | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	981	109
Commercial and industrial | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	2,845,434	2,783,744
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,898,629	1,905,636
Construction and land development | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,886,695	1,898,064
Construction and land development | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	11,934	7,572
Construction and land development | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	111	735
Construction and land development | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	390	158
Construction and land development | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,886,194	1,897,171
Construction and land development | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	425,543	382,773
Construction and land development | Residential | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	423,552	380,740
Construction and land development | Residential | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,991	2,033
Construction and land development | Residential | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	0	59
Construction and land development | Residential | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	0	0
Construction and land development | Residential | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	423,552	380,681
Construction and land development | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,473,086	1,522,863
Construction and land development | Other | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,463,143	1,517,324
Construction and land development | Other | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	9,943	5,539
Construction and land development | Other | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	111	676
Construction and land development | Other | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	390	158
Construction and land development | Other | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,462,642	1,516,490
Real Estate - 1-4 Family Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,584,118	4,635,033
Real Estate - 1-4 Family Mortgage | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,523,147	4,569,609
Real Estate - 1-4 Family Mortgage | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	60,971	65,424
Real Estate - 1-4 Family Mortgage | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	53,143	60,264
Real Estate - 1-4 Family Mortgage | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	341	7
Real Estate - 1-4 Family Mortgage | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,469,663	4,509,338
Real Estate - 1-4 Family Mortgage | First lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,792,685	3,844,097
Real Estate - 1-4 Family Mortgage | First lien | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,736,769	3,783,223
Real Estate - 1-4 Family Mortgage | First lien | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	55,916	60,874
Real Estate - 1-4 Family Mortgage | First lien | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	49,518	55,636
Real Estate - 1-4 Family Mortgage | First lien | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	341	0
Real Estate - 1-4 Family Mortgage | First lien | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,686,910	3,727,587
Real Estate - 1-4 Family Mortgage | Junior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	52,516	52,943
Real Estate - 1-4 Family Mortgage | Junior lien | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	51,385	51,467
Real Estate - 1-4 Family Mortgage | Junior lien | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,131	1,476
Real Estate - 1-4 Family Mortgage | Junior lien | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	474	743
Real Estate - 1-4 Family Mortgage | Junior lien | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	0	7
Real Estate - 1-4 Family Mortgage | Junior lien | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	50,911	50,717
Real Estate - 1-4 Family Mortgage | Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	738,917	737,993
Real Estate - 1-4 Family Mortgage | Home equity | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	734,993	734,919
Real Estate - 1-4 Family Mortgage | Home equity | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,924	3,074
Real Estate - 1-4 Family Mortgage | Home equity | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,151	3,885
Real Estate - 1-4 Family Mortgage | Home equity | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	0	0
Real Estate - 1-4 Family Mortgage | Home equity | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	731,842	731,034
Commercial real estate - owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,135,543	6,245,480
Commercial real estate - owner occupied | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,086,668	6,202,085
Commercial real estate - owner occupied | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	48,875	43,395
Commercial real estate - owner occupied | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,252	11,595
Commercial real estate - owner occupied | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,054	0
Commercial real estate - owner occupied | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,079,362	6,190,490
Commercial real estate - owner occupied | Owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,357,965	3,334,664
Commercial real estate - owner occupied | Owner-occupied | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,328,532	3,303,361
Commercial real estate - owner occupied | Owner-occupied | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	29,433	31,303
Commercial real estate - owner occupied | Owner-occupied | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,586	9,109
Commercial real estate - owner occupied | Owner-occupied | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	0	0
Commercial real estate - owner occupied | Owner-occupied | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,322,946	3,294,252
Commercial real estate - owner occupied | Multi family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,278,646	1,392,779
Commercial real estate - owner occupied | Multi family | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,277,877	1,391,994
Commercial real estate - owner occupied | Multi family | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	769	785
Commercial real estate - owner occupied | Multi family | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,413	0
Commercial real estate - owner occupied | Multi family | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	489	0
Commercial real estate - owner occupied | Multi family | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,275,975	1,391,994
Commercial real estate - owner occupied | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,856,897	4,852,701
Commercial real estate - owner occupied | Other | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,808,791	4,810,091
Commercial real estate - owner occupied | Other | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	48,106	42,610
Commercial real estate - owner occupied | Other | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,839	11,595
Commercial real estate - owner occupied | Other | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	565	0
Commercial real estate - owner occupied | Other | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	4,803,387	4,798,496
Consumer | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	103,516	107,900
Consumer | Consumer | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	103,326	107,757
Consumer | Consumer | Nonaccruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	190	143
Consumer | Consumer | 30-89 Days Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	555	879
Consumer | Consumer | 90 Days or More Past Due | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	13	14
Consumer | Consumer | Current Loans | Accruing Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 102,758	$ 106,864

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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