EMPLOYEE SAVINGS AND BENEFIT PLANS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred compensation
Beginning of period balance	$ 33,229	$ 30,928	$ 40,995
Employee compensation deferrals	0	15	384
Employee compensation payments	(3,333)	(3,826)	(8,709)
Increase (decrease) in plan fair value	3,578	6,112	(1,742)
End of period balance	33,474	33,229	30,928
401(K) savings plan expense	$ 2,200	$ 5,600	$ 6,100