Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 381,601	$ 337,459	$ 353,055	$ 300,665
Loans charged-off to the allowance for credit losses	23,139	24,709	72,773	57,616
Recovery of previously charged-off loans	4,791	6,616	15,315	22,461
Provision for Loan and Lease Losses	28,281	26,826	95,937	80,682
Ending Balance	391,534	346,192	391,534	346,192
Commercial real estate - owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	29,847	26,497	28,690	26,617
Loans charged-off to the allowance for credit losses	0	0	8,904	0
Recovery of previously charged-off loans	11	52	153	66
Provision for Loan and Lease Losses	1,842	1,329	11,761	1,195
Ending Balance	31,700	27,878	31,700	27,878
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	154,014	148,418	148,212	144,353
Loans charged-off to the allowance for credit losses	19,842	20,330	50,611	45,158
Recovery of previously charged-off loans	3,281	3,831	10,030	11,959
Provision for Loan and Lease Losses	24,918	12,383	54,740	33,148
Ending Balance	162,371	144,302	162,371	144,302
Consumer real estate – mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	80,247	59,374	71,354	36,536
Loans charged-off to the allowance for credit losses	126	168	788	598
Recovery of previously charged-off loans	168	374	849	1,989
Provision for Loan and Lease Losses	(4,102)	10,917	4,772	32,570
Ending Balance	76,187	70,497	76,187	70,497
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	30,035	38,855	39,142	36,114
Loans charged-off to the allowance for credit losses	0	3	0	3
Recovery of previously charged-off loans	0	86	9	337
Provision for Loan and Lease Losses	2,340	(1,908)	(6,776)	582
Ending Balance	32,375	37,030	32,375	37,030
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	8,494	9,207	7,970	16,566
Loans charged-off to the allowance for credit losses	2,905	4,208	9,123	11,857
Recovery of previously charged-off loans	1,319	2,229	4,234	6,877
Provision for Loan and Lease Losses	1,230	2,008	5,057	(2,350)
Ending Balance	8,138	9,236	8,138	9,236
Commercial real estate - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	78,964	55,108	57,687	40,479
Loans charged-off to the allowance for credit losses	266	0	3,347	0
Recovery of previously charged-off loans	12	44	40	1,233
Provision for Loan and Lease Losses	2,053	2,097	26,383	15,537
Ending Balance	$ 80,763	$ 57,249	$ 80,763	$ 57,249

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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