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Fair Value Measurements - Summary of Changes in the Fair Value of the Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Mark-to-market of contingent consideration $ 228 $ (210)
NLEX [Member] | Contingent Consideration [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Beginning balance 4,198  
Acquisition contingent consideration   4,198
Payment of contingent consideration (513)  
Mark-to-market of contingent consideration (228)  
Ending balance $ 3,457 $ 4,198