Fair Value Measurements - Summary of Changes in the Fair Value of the Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Payment of contingent consideration			$ (400)	$ 0
Fair value adjustment of contingent consideration	$ 925	$ 38	857	$ (52)
NLEX [Member] | Contingent Consideration [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning balance			3,457
Payment of contingent consideration	(400)		(400)
Fair value adjustment of contingent consideration			(857)
Ending balance	$ 2,200		$ 2,200