Fair Value Measurement - Financial Assets and Liabilities (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Money Market Funds [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value $ 5,627 $ 5,627
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 5,627 5,627
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0 0
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0 0
Commercial Paper [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 20,989  
Commercial Paper [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0  
Commercial Paper [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 20,989  
Available for sale securities 1,996  
Commercial Paper [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0  
Derivative Financial Instruments, Assets [Member] | Interest Rate Swap [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value (396) 165
Derivative Financial Instruments, Assets [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Interest Rate Swap [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0 0
Derivative Financial Instruments, Assets [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest Rate Swap [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value (396) 165
Derivative Financial Instruments, Assets [Member] | Significant Unobservable Inputs (Level 3) [Member] | Interest Rate Swap [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0 0
Contingent Consideration [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value (6,752) (3,770)
Contingent Consideration [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0 0
Contingent Consideration [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value 0 0
Contingent Consideration [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Schedule of financial assets and liabilities measured at fair value on recurring basis    
Financial assets and liabilities measured at fair value $ (6,752) $ (3,770)