LONG-TERM DEBT - Rollforward (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
LONG-TERM DEBT
Total debt	$ 910,168	$ 929,901
Less: current portion of long-term debt	20,097	38,706
Less: original issue discount and issuance costs	15,572	17,438
Long-term debt, net	874,499	873,757
2017 Credit Facility [Member]
LONG-TERM DEBT
Total debt	322,277	323,926
2018 Credit Facility [Member]
LONG-TERM DEBT
Total debt	177,838	192,000
Asset Backed Credit Facility [Member]
LONG-TERM DEBT
Total debt	9,000	0
Senior Subordinated Notes due February 2020 [Member]
LONG-TERM DEBT
Total debt	0	2,037
7.375% Senior Secured Notes due April 2022 [Member]
LONG-TERM DEBT
Total debt	350,000	350,000
Comcast Note due April 2019 [Member]
LONG-TERM DEBT
Total debt	0	11,872
MGM National Harbor Loan [Member]
LONG-TERM DEBT
Total debt	$ 51,053	$ 50,066