DEFERRED REVENUE AND OTHER CURRENT LIABILITIES - Deferred Revenue and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 34,802	$ 38,044
Accrued compensation and related benefits	32,177	34,700
Accrued occupancy	8,732	8,815
Accrued sales tax	3,022	2,626
Accrued interest	2,124	2,383
Accrued income taxes	0	1,454
Other current liabilities	27,815	27,149
Total deferred revenue and other current liabilities	108,672	115,171
Gold Card Membership Program
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 24,400	$ 24,400