Fair Value Measurements - Summary of Changes in the Fair Value of the Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Payment of contingent consideration			$ (627)	$ (513)
Fair value adjustment of contingent consideration	$ 43	$ (87)	900	$ (139)
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			(627)
Fair value adjustment of contingent consideration			(900)
Ending balance	$ 1,930		$ 1,930