EMPLOYEE BENEFIT PLANS AND DEFERRED COMPENSATION ARRANGEMENTS (Details) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 31, 2017	Dec. 31, 2020	Dec. 31, 2019
EMPLOYEE BENEFIT PLANS AND DEFERRED COMPENSATION ARRANGEMENTS
Term of service for 401K participation		3 months
Company's contributions to the 401K plan		$ 2,100,000	$ 1,900,000
Executive Deferred Compensation Arrangements
EMPLOYEE BENEFIT PLANS AND DEFERRED COMPENSATION ARRANGEMENTS
Employers contribution of incentive bonus (as a percent)		25.00%
Deferred plan liability		$ 2,000,000.0	2,700,000
2008 Salary Continuation Agreement
EMPLOYEE BENEFIT PLANS AND DEFERRED COMPENSATION ARRANGEMENTS
Deferred plan liability		246,000	335,000
Annual compensation payment amount		$ 100,000
Contractual term		10 years
Commencement age		65 years
2017 Salary Continuation Agreement 2017
EMPLOYEE BENEFIT PLANS AND DEFERRED COMPENSATION ARRANGEMENTS
Deferred plan liability		$ 640,000	$ 437,000
Annual compensation payment amount	$ 200,000
Contractual term	10 years
Commencement age	70 years