PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Short-term investments in real estate	$ 39,320	$ 29,405
Maintenance agreements, current portion	6,362	8,014
Income taxes receivable	9,702	9,227
Prepaid expenses	7,748	7,898
Other current assets	10,823	10,198
Total	$ 73,955	$ 64,742