SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands				3 Months Ended
	Mar. 31, 2020	Mar. 30, 2020	Aug. 12, 2019	Mar. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Long-term debt					$ 446,000	$ 610,787
Subsequent Event | Revolving Credit Facility [Member]
Proceeds from Lines of Credit				$ 7,100
Long-term debt	$ 22,700
New Amended FS/KKR Credit Agreement [Member]
Netting of cash for calculating leverage ratio covenant			$ 5,000
New Amended FS/KKR Credit Agreement [Member] | Subsequent Event
Quarterly amortization payments		$ 2,100
Netting of cash for calculating leverage ratio covenant	$ 10,000	$ 5,000