Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Details)

v3.10.0.1
Commitments and Contingencies - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 30, 2018
Loss Contingencies [Line Items]        
Operating leases, rent expense $ 6,463 $ 6,362 $ 6,147  
Undisclosed Name of Acquiree One        
Loss Contingencies [Line Items]        
Contingent consideration, liability, certain acquired receivables $ 425      
Contingent consideration, liability, acquired receivables, payment period 15 months      
Undisclosed Name of Acquiree Two        
Loss Contingencies [Line Items]        
Contingent consideration, liability, revenue earn-outs, payment period 5 years      
Contingent consideration, liability, fair value $ 599     $ 555
Contingent consideration liabilities 2,000      
Undisclosed Name Of Acquiree Three        
Loss Contingencies [Line Items]        
Contingent consideration liabilities $ 363