LONG-TERM INCENTIVE COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
DomesticEmployeeServiceAward [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 2,067	$ 2,188
Performance Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	419	928
DomesticServiceAndPerformanceAward [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	2,486	3,116
CanadianEmployeeServiceAward [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	130	136
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 2,616	$ 3,252