ACQUISITIONS - Schedule of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Apr. 08, 2022	Nov. 20, 2021	Dec. 31, 2025	Dec. 31, 2024	Nov. 19, 2021
Assets Acquired
Goodwill			$ 1,320,799	$ 1,320,799
Spirit of Texas Bancshares, Inc.
Assets Acquired
Cash and due from banks		$ 277,790			$ 277,790
Investment securities		348,687			362,088
Loans acquired		2,294,160			2,314,085
Allowance for credit losses on loans		(9,623)			(17,005)
Premises and equipment		65,061			84,135
Bank owned life insurance		36,890			36,890
Goodwill		0			77,681
Other assets		54,992			58,403
Total assets acquired		3,106,588			3,200,312
Deposits:
Noninterest bearing transaction accounts		824,694			825,228
Interest bearing transaction accounts and savings deposits		1,383,663			1,383,663
Time deposits		510,290			509,209
Total deposits		2,718,647			2,718,100
Other borrowings		38,050			37,547
Subordinated debentures		37,370			36,491
Accrued interest and other liabilities		20,356			23,667
Total liabilities assumed		2,814,423			2,815,805
Equity		0			384,507
Total liabilities and equity assumed		2,814,423			3,200,312
Net assets acquired		292,165
Purchase price		466,311
Goodwill	$ 174,100	174,146
Spirit of Texas Bancshares, Inc. | Fair Value Adjustments
Assets Acquired
Cash and due from banks		0
Investment securities		(13,401)
Loans acquired		(19,925)
Allowance for credit losses on loans		7,382
Premises and equipment		(19,074)
Bank owned life insurance		0
Goodwill		(77,681)
Other assets		(3,411)
Total assets acquired		(93,724)
Deposits:
Noninterest bearing transaction accounts		(534)
Interest bearing transaction accounts and savings deposits		0
Time deposits		1,081
Total deposits		547
Other borrowings		503
Subordinated debentures		879
Accrued interest and other liabilities		(3,311)
Total liabilities assumed		(1,382)
Equity		(384,507)
Total liabilities and equity assumed		(385,889)
Core Deposit Premium | Spirit of Texas Bancshares, Inc.
Assets Acquired
Core deposit and other intangible assets		38,631			$ 6,245
Core Deposit Premium | Spirit of Texas Bancshares, Inc. | Fair Value Adjustments
Assets Acquired
Core deposit and other intangible assets		$ 32,386