SUBSEQUENT EVENT - AGREEMENT AND PLAN OF MERGER (Details) - USD ($)	Oct. 26, 2022	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Subsequent Event [Line Items]
Assets		$ 5,999,663,000	$ 6,093,632,000	$ 6,187,634,000
Other real estate owned		1,634,000	1,792,000
Cash and cash equivalents		754,393,000	756,971,000
Liabilities		5,158,705,000	5,259,400,000
Deposits		4,800,508,000	4,840,418,000
Federal Home Loan Bank advances		20,000,000	$ 25,000,000
CBank
Subsequent Event [Line Items]
Assets		271,000,000
Total loans		214,000,000
Other real estate owned		0
Marketable Securities		17,000,000
Cash and cash equivalents		35,000,000
Other assets		8,000,000
Liabilities		242,000,000
Deposits		240,000,000
Federal Home Loan Bank advances		$ 1,000,000
Subsequent event | CBank
Subsequent Event [Line Items]
Cash payment for acquisition	$ 51,000,000
Termination Fee	$ 2,040,000