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Long-Term Debt (Detail) - USD ($)
3 Months Ended
Dec. 23, 2013
May 13, 2011
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Oct. 30, 2017
Debt Instrument [Line Items]            
Write-off of debt issuance costs and debt discounts       $ 25,900,000    
Amortization of debt issuance costs/discounts     $ 0   $ 2,510,000  
Senior notes redeemable   100.00%        
Adequate protection payments on term loan     22,131,000   $ 0  
Senior notes   $ 610,000,000.0 610,000,000.0      
Amended and Restated Credit Agreement | Revolving Credit Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 200,000,000.0          
Adequate protection payments on term loan     22,131,000      
Amended and Restated Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Long-term Line of Credit     $ 1,700,000,000 $ 1,720,000,000    
Basis spread on variable rate 1.00%          
Interest rate 2.00%          
Interest rate at period end     4.90%      
Percentage of any future first tier foreign subsidiaries capital stock collateralized 66.00%          
7.75% senior notes            
Debt Instrument [Line Items]            
Interest rate   7.75% 7.75% 7.75%    
Decrease in interest expense     $ 11,800,000      
Interest expense forgone           $ 23,600,000
London Interbank Offered Rate | Amended and Restated Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Basis spread on variable rate 3.25%          
Base Rate | Amended and Restated Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Basis spread on variable rate 2.25%          
Federal Funds Rate | Amended and Restated Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Basis spread on variable rate 0.50%          
Minimum | London Interbank Offered Rate | Amended and Restated Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Interest rate 1.00%