BUSINESS COMBINATIONS - Schedule of Recognized Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands				12 Months Ended			13 Months Ended
	Dec. 31, 2022	Aug. 01, 2022	Dec. 03, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2019
Business Combination, Consideration Transferred [Abstract]
Total purchase price, measurement period adjustments							$ (281)
Liabilities and equity:
Other liabilities, measurement period adjustments							(281)
Total liabilities, measurement period adjustments							(281)
Net assets acquired, measurement period adjustments							281
Goodwill	$ 180,254			$ 180,254	$ 156,663	$ 156,944	180,254	$ 158,572
Acquisition gain				(281)	$ (1,300)	$ (7,835)
Beach Bancorp
Business Combination, Consideration Transferred [Abstract]
Total purchase price		$ 101,470
Identifiable assets:
Cash		23,939
Investments		22,643
Loans		485,171
Other real estate		8,676
Bank owned life insurance		10,092
Core deposit intangible		9,791
Personal and real property		11,895
Deferred tax asset		27,075
Other assets		9,235
Total assets		608,517
Liabilities and equity:
Deposits		490,591
Other liabilities		14,772
Total liabilities		530,363
Net assets acquired		78,154
Goodwill		23,316
Borrowings		$ 25,000
Cadence Bank, N.A
Business Combination, Consideration Transferred [Abstract]
Total purchase price	1,000		$ 1,000
Identifiable assets:
Cash	359,916		359,916	359,916			359,916
Loans	40,262		40,262	40,262			40,262
Core deposit intangible	2,890		2,890	2,890			2,890
Personal and real property	9,675		9,675	9,675			9,675
Other assets	135		135	135			135
Total assets	412,878		412,878	412,878			412,878
Liabilities and equity:
Deposits	410,171		410,171	410,171			410,171
Other liabilities	126		407	126			126
Total liabilities	410,297		410,578	410,297			410,297
Net assets acquired	2,581		2,300	$ 2,581			$ 2,581
Acquisition gain	$ (1,581)		$ (1,300)