Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 313,841	$ 261,618	$ 300,665	$ 263,233
Charged-off loans	(18,885)	(9,173)	(32,907)	(15,685)
Recovery of previously charged-off loans	9,113	8,296	15,845	11,850
Provision for Loan and Lease Losses	33,390	11,742	53,856	13,085
Ending Balance	337,459	272,483	337,459	272,483
Commercial real estate - Owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	23,598	19,505	26,617	19,618
Charged-off loans	0	(879)	0	(965)
Recovery of previously charged-off loans	6	207	14	334
Provision for Loan and Lease Losses	2,893	776	(134)	622
Ending Balance	26,497	19,609	26,497	19,609
Commercial real estate - Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	41,914	56,078	40,479	58,504
Charged-off loans	0	(185)	0	(185)
Recovery of previously charged-off loans	1,159	184	1,189	247
Provision for Loan and Lease Losses	12,035	(3,530)	13,440	(6,019)
Ending Balance	55,108	52,547	55,108	52,547
Consumer real estate – mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	39,160	32,320	36,536	32,104
Charged-off loans	(300)	(92)	(430)	(254)
Recovery of previously charged-off loans	944	578	1,615	872
Provision for Loan and Lease Losses	19,570	1,077	21,653	1,161
Ending Balance	59,374	33,883	59,374	33,883
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	37,599	29,823	36,114	29,429
Charged-off loans	0	(150)	0	(150)
Recovery of previously charged-off loans	30	75	251	149
Provision for Loan and Lease Losses	1,226	(1,067)	2,490	(747)
Ending Balance	38,855	28,681	38,855	28,681
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	153,629	112,412	144,353	112,340
Charged-off loans	(14,179)	(5,275)	(24,828)	(9,655)
Recovery of previously charged-off loans	4,417	5,600	8,128	7,524
Provision for Loan and Lease Losses	4,551	13,035	20,765	15,563
Ending Balance	148,418	125,772	148,418	125,772
Consumer and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	17,941	11,480	16,566	11,238
Charged-off loans	(4,406)	(2,592)	(7,649)	(4,476)
Recovery of previously charged-off loans	2,557	1,652	4,648	2,724
Provision for Loan and Lease Losses	(6,885)	1,451	(4,358)	2,505
Ending Balance	$ 9,207	$ 11,991	$ 9,207	$ 11,991

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 writeoff of financing receivable, charged against allowance for credit loss.

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