LONG-TERM DEBT - Rollforward (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
LONG-TERM DEBT
Total debt	$ 893,777	$ 929,901
Less: current portion of long-term debt	22,981	38,706
Less: original issue discount and issuance costs	14,607	17,438
Long-term debt, net	856,189	873,757
2017 Credit Facility [Member]
LONG-TERM DEBT
Total debt	321,453	323,926
2018 Credit Facility [Member]
LONG-TERM DEBT
Total debt	170,746	192,000
Asset Backed Credit Facility [Member]
LONG-TERM DEBT
Total debt	0	0
9.25% 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	$ 51,578	$ 50,066