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Derivative Financial Instruments - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Aug. 31, 2015
USD ($)
Dec. 31, 2017
USD ($)
Derivative
Dec. 31, 2016
USD ($)
Derivative
Dec. 31, 2015
USD ($)
Aug. 13, 2015
Jul. 31, 2015
USD ($)
Swap
Mar. 31, 2011
USD ($)
Swap
Derivative [Line Items]              
Derivative notional amount             $ 400,000,000
Number of interest rate swap agreements entered | Swap             5
Interest expense   $ 136,814,000 $ 144,851,000 $ 118,880,000      
Unrealized (losses) gains on interest rate swaps, net of tax   585,000 (1,431,000) (4,107,000)      
Reclassification out of accumulated other comprehensive income [Member]              
Derivative [Line Items]              
Ineffectiveness of significant hedge   0 0 0      
Amount to be reclassified to interest expense   3,100,000          
Reclassification out of accumulated other comprehensive income [Member] | Accumulated net gain (loss) from designated or qualifying cash flow hedges [Member]              
Derivative [Line Items]              
Interest expense   $ 7,400,000 $ 10,700,000 $ 11,900,000      
4.875% Senior Notes [Member]              
Derivative [Line Items]              
Interest rate of long-term debt   4.875% 4.875% 4.875% 4.875%    
4.875% Senior Notes [Member] | Senior Notes [Member]              
Derivative [Line Items]              
Interest rate of long-term debt   4.875% 4.875%   4.875%    
Interest rate swap agreements effective August 2015 [Member]              
Derivative [Line Items]              
Derivative notional amount           $ 300,000,000  
Number of interest rate swap agreements entered | Swap           3  
Ineffectiveness of significant hedge   $ 0 $ 0 $ 0      
Cash settlement for termination of interest rate swap agreements $ 6,200,000            
Interest rate swap agreements effective August 2015 [Member] | Reclassification out of accumulated other comprehensive income [Member]              
Derivative [Line Items]              
Amount to be reclassified to interest expense   600,000          
Interest rate swap agreements effective August 2015 [Member] | Reclassification out of accumulated other comprehensive income [Member] | Accumulated net gain (loss) from designated or qualifying cash flow hedges [Member]              
Derivative [Line Items]              
Interest expense   $ 600,000 600,000        
Interest rate swap agreement expired on October 2017 [Member]              
Derivative [Line Items]              
Derivative notional amount             $ 200,000,000
Interest rate swap, expiration date   2017-10          
Interest rate swap agreement expiring on September 2019 [Member]              
Derivative [Line Items]              
Derivative notional amount             $ 200,000,000
Interest rate swap agreement expiring on September 2019 [Member] | Reclassification out of accumulated other comprehensive income [Member] | Accumulated net gain (loss) from designated or qualifying cash flow hedges [Member]              
Derivative [Line Items]              
Interest rate swap, expiration date   2019-09          
Interest rate swaps [Member]              
Derivative [Line Items]              
Unrealized (losses) gains on interest rate swaps, net of tax   $ 900,000 (2,400,000) (6,500,000)      
Interest rate swaps   $ 4,800,000 13,200,000        
Foreign currency exchange forward contracts [Member]              
Derivative [Line Items]              
Net gains on foreign currency exchange     $ 7,700,000 $ 24,200,000      
Number of foreign currency exchange forward contracts outstanding | Derivative   0 0        
Expiration of foreign currency derivatives   2016-12