Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following is a summary of the goodwill balance for each reportable segment as of December 31 (in thousands): 

	North America			International			Total
Balance as of December 31, 2015	$	170,736		$	35,521		$	206,257
Foreign exchange impact	21			(3,578		)	(3,557		)
Balance as of December 31, 2016	170,757			31,943			202,700
Foreign exchange impact	(72		)	(2,682		)	(2,754		)
Balance as of December 31, 2017	$	170,685		$	29,262		$	199,946