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Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 300,665	$ 263,233
Charged-off loans	(14,022)	(6,512)
Recovery of previously charged-off loans	6,732	3,554
Provision for Loan and Lease Losses	20,466	1,343
Ending Balance	313,841	261,618
Commercial real estate - Owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	26,617	19,618
Charged-off loans	0	(86)
Recovery of previously charged-off loans	8	127
Provision for Loan and Lease Losses	(3,027)	(154)
Ending Balance	23,598	19,505
Commercial real estate - Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	40,479	58,504
Charged-off loans	0	0
Recovery of previously charged-off loans	30	63
Provision for Loan and Lease Losses	1,405	(2,489)
Ending Balance	41,914	56,078
Consumer real estate – mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	36,536	32,104
Charged-off loans	(130)	(162)
Recovery of previously charged-off loans	671	294
Provision for Loan and Lease Losses	2,083	84
Ending Balance	39,160	32,320
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	36,114	29,429
Charged-off loans	0	0
Recovery of previously charged-off loans	221	74
Provision for Loan and Lease Losses	1,264	320
Ending Balance	37,599	29,823
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	144,353	112,340
Charged-off loans	(10,649)	(4,380)
Recovery of previously charged-off loans	3,711	1,924
Provision for Loan and Lease Losses	16,214	2,528
Ending Balance	153,629	112,412
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	16,566	11,238
Charged-off loans	(3,243)	(1,884)
Recovery of previously charged-off loans	2,091	1,072
Provision for Loan and Lease Losses	2,527	1,054
Ending Balance	$ 17,941	$ 11,480

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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