SUMMARY OF QUARTERLY FINANCIAL DATA (UNAUDITED) - ADDITIONAL DISCLOSURES (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated quarterly financial data
Incentive compensation expense	$ 1,200,000	$ 2,300,000	$ 2,300,000	$ 2,300,000	$ 2,000,000.0	$ 2,400,000	$ 2,100,000	$ 1,800,000
Death benefits in excess of cash surrender value of life insurance	$ 979,000								$ 979,000
FHLB advances early termination penalties					$ 2,100,000				$ 0	$ 2,108,000	$ 0
Tax Refund Solutions | Easy Advances
Consolidated quarterly financial data
Provision expense for EAs				$ 16,000,000.0				$ 15,200,000