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Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 414,494	$ 353,055
Loans charged-off to the allowance for credit losses	17,972	20,832
Recovery of previously charged-off loans	3,980	4,617
Financing Receivable, Credit Loss, Expense (Reversal)	16,960	34,497
Ending Balance	417,462	371,337
Commercial real estate - owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	36,997	28,690
Loans charged-off to the allowance for credit losses	173	94
Recovery of previously charged-off loans	13	17
Financing Receivable, Credit Loss, Expense (Reversal)	2,265	1,077
Ending Balance	39,102	29,690
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	174,799	148,212
Loans charged-off to the allowance for credit losses	14,524	14,808
Recovery of previously charged-off loans	2,267	2,822
Financing Receivable, Credit Loss, Expense (Reversal)	20,663	14,946
Ending Balance	183,205	151,172
Consumer real estate – mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	80,042	71,354
Loans charged-off to the allowance for credit losses	450	623
Recovery of previously charged-off loans	223	244
Financing Receivable, Credit Loss, Expense (Reversal)	6,632	4,839
Ending Balance	86,447	75,814
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	33,620	39,142
Loans charged-off to the allowance for credit losses	0	0
Recovery of previously charged-off loans	2	7
Financing Receivable, Credit Loss, Expense (Reversal)	(3,161)	(5,415)
Ending Balance	30,461	33,734
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	8,382	7,970
Loans charged-off to the allowance for credit losses	2,825	3,307
Recovery of previously charged-off loans	1,465	1,513
Financing Receivable, Credit Loss, Expense (Reversal)	1,399	2,170
Ending Balance	8,421	8,346
Commercial real estate - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	80,654	57,687
Loans charged-off to the allowance for credit losses	0	2,000
Recovery of previously charged-off loans	10	14
Financing Receivable, Credit Loss, Expense (Reversal)	(10,838)	16,880
Ending Balance	$ 69,826	$ 72,581

X

- Definition

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

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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