DEFERRED COMPENSATION PLANS - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cash surrender value of life insurance	$ 175,300	$ 104,100
Deferred compensation arrangement with individual, recorded liability	698	769
Deferred compensation arrangement with individual, compensation expense	386	739	$ 1,400
Supplemental Employee Retirement Plan
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation arrangement with individual, recorded liability	$ 9,500	$ 5,500