DEFERRED REVENUE AND OTHER CURRENT LIABILITIES - Deferred Revenue and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
DEFERRED REVENUE AND OTHER CURRENT LIABILITIES
Deferred revenue	$ 34,253	$ 37,629
Accrued compensation and related benefits	35,850	38,866
Accrued occupancy	1,929	9,106
Accrued sales tax	1,914	2,571
Accrued interest	3,776	1,828
Interest rate swap	5,013	0
Other current liabilities	23,057	30,169
Total deferred revenue and other current liabilities	$ 105,792	$ 120,169