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Debt and Short-Term Borrowings - Total Debt (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 17, 2013
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Note payable   $ 2,900 $ 3,400
Total debt   645,443 650,759
Note Payable due on October 1, 2017      
Debt Instrument [Line Items]      
Note payable   1,151 1,524
Note Payable due on July 1, 2017      
Debt Instrument [Line Items]      
Note payable   365 357
Note Payable due on August 31, 2019 | Notes Payable      
Debt Instrument [Line Items]      
Total debt   $ 815 890
Fixed interest rate   7.50%  
Note Payable due on April 30, 2021      
Debt Instrument [Line Items]      
Note payable   $ 504 532
Term A due on April 17, 2018 | Credit Facility      
Debt Instrument [Line Items]      
Credit facility   $ 28,307 28,721
Margin interest rate   2.25%  
Term A due on April 17, 2018 | Credit Facility | LIBOR      
Debt Instrument [Line Items]      
Margin interest rate 2.50%    
Term A due January 17, 2020 | Credit Facility      
Debt Instrument [Line Items]      
Credit facility   $ 209,659 212,661
Term A due January 17, 2020 | Credit Facility | LIBOR      
Debt Instrument [Line Items]      
Margin interest rate 2.50% 2.50%  
Term B due on April 17, 2020 | Credit Facility      
Debt Instrument [Line Items]      
Credit facility   $ 377,642 378,074
Term B due on April 17, 2020 | Credit Facility | LIBOR      
Debt Instrument [Line Items]      
Margin interest rate 2.75% 0.75%  
Term B due on April 17, 2020 | Credit Facility | Applicable Margin      
Debt Instrument [Line Items]      
Margin interest rate   2.50%  
Senior Secured Revolving Credit Facility | Credit Facility      
Debt Instrument [Line Items]      
Note payable   $ 27,000 $ 28,000
Senior Secured Revolving Credit Facility | Credit Facility | LIBOR      
Debt Instrument [Line Items]      
Margin interest rate 2.50% 2.50%