SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS (Details) - Plan Details and Change in Benefit Obligation $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) payment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS
Number of annual payments | payment	15
Change in Benefit Obligation
Benefit obligation at the beginning of the period	$ 18,927	$ 20,793
Service cost	84	92
Interest cost	165	150
Payments	(1,877)	(1,877)
Benefit Obligation at the end of the period	17,299	$ 19,158
Amounts Recognized in the Consolidated Balance Sheets:
Accrued expenses and other current liabilities	1,913		$ 1,913
Other liabilities	15,386		17,014
Total accrued liabilities	$ 17,299		$ 18,927