ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2018

Other Liabilities, Current [Abstract]

Summary of Accrued Expenses and Other Current Liabilities

	December 31,
	2017		2018
Accrued expenses	$	33,241	$	32,634
Hedging transaction liability		2,973		2,596
Uncertain tax positions		1,378		334
	$	37,592	$	35,564