Loans Held for Investment - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Loans
Loans past Due 30-59 Days	$ 8,807,076		$ 8,311,952
Allowance for loan losses	(93,862)	$ (84,856)	(91,537)	$ (95,168)	$ (97,961)	$ (101,116)
Loans held for investment, net	8,713,214		8,220,415
Commercial real estate \| Non-owner occupied
Loans
Loans past Due 30-59 Days	2,284,984		2,121,087
Allowance for loan losses	(24,175)	(24,446)	(24,265)	(28,716)	(27,837)	(29,310)
Commercial real estate \| Owner occupied
Loans
Loans past Due 30-59 Days	1,574,656		1,533,173
Allowance for loan losses	(36,720)	(31,025)	(34,035)	(30,576)	(34,154)	(33,112)
Commercial and industrial
Loans
Loans past Due 30-59 Days	1,605,810		1,526,467
Allowance for loan losses	(19,416)	(18,401)	(21,280)	(22,752)	(23,015)	(25,609)
Construction and land development
Loans
Loans past Due 30-59 Days	972,122		894,011
Allowance for loan losses	(8,172)	(5,985)	(7,398)	(7,356)	(7,341)	(7,161)
1-4 family residential
Loans
Loans past Due 30-59 Days	1,951,905		1,861,654
Allowance for loan losses	(4,898)	(4,464)	(4,136)	(5,201)	(5,057)	(5,327)
Consumer
Loans
Loans past Due 30-59 Days	27,251		31,027
Allowance for loan losses	(379)	(450)	(397)	(438)	(538)	(547)
Broker-dealer
Loans
Loans past Due 30-59 Days	390,348		344,533
Allowance for loan losses	$ (102)	$ (85)	$ (26)	$ (129)	$ (19)	$ (50)