Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of components of accumulated other comprehensive loss

  The components of accumulated other comprehensive loss consist of the following:

	Year ended December 31,
	2018			2017			2016
Net derivative instruments, beginning of year	$	37		$	(17	)	$	—
Net derivative instrument gain (loss), net of tax		99			54			(17	)
Net derivative instruments, end of year		136			37			(17	)
Cumulative translation adjustments, beginning of year		(17,869	)		(57,965	)		(48,091	)
Translation adjustments		(15,917	)		40,096			(9,874	)
Cumulative translation adjustments, end of year		(33,786	)		(17,869	)		(57,965	)
Accumulated other comprehensive loss	$	(33,650	)	$	(17,832	)	$	(57,982	)