SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Class of Stock [Line Items]
Restricted cash	$ 1,647				$ 1,647		$ 2,921
Reduction in share based compensation expense					(2,100)	$ (1,600)
Increase in net income	$ (23,555)	$ (8,878)	$ 17,180	$ 17,596	$ (32,433)	$ 34,776
Treasury shares retired (in shares)					10,892,083	1,431,980