BUSINESS COMBINATIONS - Schedule of Identifiable Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands					12 Months Ended	14 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jan. 01, 2023	Aug. 01, 2022	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2024	Jan. 31, 2023
Liabilities and equity:
Goodwill	$ 272,520				$ 272,520		$ 272,520
Heritage Southeast Bank
Identifiable assets:
Consideration paid	221,538		$ 221,538
Cash	106,793		106,973		106,793
Investments	172,775		172,775		172,775
Loans	1,155,712		1,155,712		1,155,712			$ 1,159,000
Other real estate	1,189		857		1,189
Bank owned life insurance	35,579		35,579		35,579
Core deposit intangible	43,739		43,739		43,739
Personal and real property	35,963		35,963		35,963
Deferred tax asset	6,129		6,761		6,129
Other assets	3,103		3,103		3,103
Interest receivable	4,349		4,349		4,349
Total assets	1,565,331		1,565,811		1,565,331
Liabilities and equity:
Deposits	1,392,432		1,392,432		1,392,432
Borrowings	9,015		9,015		9,015
Other liabilities	34,271		34,271		34,271
Total liabilities	1,435,718		1,435,718		1,435,718
Net assets acquired	129,613		130,093		129,613
Goodwill	$ 91,925		$ 91,445		91,925
Measurement Period Adjustments
Consideration paid					0
Cash					(180)
Investments					0
Loans					0
Other real estate					332
Bank owned life insurance					0
Core deposit intangible					0
Personal and real property					0
Deferred tax asset					(632)
Interest receivable					0
Other assets					0
Total assets					(480)
Deposits					0
Borrowings					0
Other liabilities					0
Total liabilities					0
Net assets acquired					(480)
Goodwill					$ 480
Beach Bancorp
Identifiable assets:
Consideration paid		$ 101,470		$ 101,470
Cash		23,939		23,939		$ 23,939
Investments		22,643		22,907		22,643
Loans		485,171		482,903		485,171
Other real estate		8,217		8,797		8,217
Bank owned life insurance		10,092		10,092		10,092
Core deposit intangible		9,791		9,791		9,791
Personal and real property		11,957		13,825		11,957
Deferred tax asset		27,135		28,105		27,135
Other assets		9,235		9,649		9,235
Total assets		608,180		610,008		608,180
Liabilities and equity:
Deposits		490,591		490,588		490,591
Borrowings		25,000		25,000		25,000
Other liabilities		14,772		14,772		14,772
Total liabilities		530,363		530,360		530,363
Net assets acquired		77,817		79,648		77,817
Goodwill		$ 23,653		$ 21,822		23,653
Measurement Period Adjustments
Consideration paid						0
Cash						0
Investments						(264)
Loans						2,268
Other real estate						(580)
Bank owned life insurance						0
Core deposit intangible						0
Personal and real property						(1,868)
Deferred tax asset						(970)
Other assets						(414)
Total assets						(1,828)
Deposits						3
Borrowings						0
Other liabilities						0
Total liabilities						3
Net assets acquired						(1,831)
Goodwill						$ 1,831