Quarterly report pursuant to Section 13 or 15(d)

Business Combination - Additional Information (Details)

v3.8.0.1
Business Combination - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 09, 2017
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
Jun. 30, 2017
Business Acquisition [Line Items]          
Purchase consideration, acquisition holdback paid     $ 5,490,000 $ 0  
Goodwill   $ 350,023,000 350,023,000   $ 349,526,000
Privately-Held Design and Manufacturing Company          
Business Acquisition [Line Items]          
Total purchase consideration $ 37,100,000        
Purchase consideration, acquisition holdback paid   4,800,000      
Goodwill $ 14,800,000 14,764,000 14,764,000    
Goodwill recognized, deductible for income tax purposes   $ 0 $ 0