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Long-Term Debt - Additional information (Detail) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2015
Jun. 30, 2015
Oct. 03, 2015
Dec. 31, 2015
Jul. 31, 2015
Dec. 31, 2014
Interest rate cap premiums            
Debt Instrument [Line Items]            
Hedging asset $ 135,000,000          
Payments for hedging asset $ 1,000,000          
New Term Loan            
Debt Instrument [Line Items]            
Debt outstanding       $ 245,000,000   $ 0
Senior Unsecured Notes            
Debt Instrument [Line Items]            
Debt outstanding       0   $ 200,000,000
New Credit Facilities | First Two Years            
Debt Instrument [Line Items]            
Prepayment percentage of principal   5.00%        
New Credit Facilities | Third Year            
Debt Instrument [Line Items]            
Prepayment percentage of principal   7.50%        
New Credit Facilities | Fourth and Fifth Year            
Debt Instrument [Line Items]            
Prepayment percentage of principal   10.00%        
New Credit Facilities | Federal Funds Rate            
Debt Instrument [Line Items]            
Fixed rate spread (percent)   0.50%        
New Credit Facilities | Eurodollar Rate            
Debt Instrument [Line Items]            
Fixed rate spread (percent)   1.00%        
New Credit Facilities | Minimum            
Debt Instrument [Line Items]            
Commitment fee (percent)   0.175%        
New Credit Facilities | Minimum | LIBOR Rate            
Debt Instrument [Line Items]            
Variable rate spread (percent)   1.50%        
New Credit Facilities | Minimum | Base Rate            
Debt Instrument [Line Items]            
Variable rate spread (percent)   0.50%        
New Credit Facilities | Maximum            
Debt Instrument [Line Items]            
Commitment fee (percent)   0.30%        
New Credit Facilities | Maximum | LIBOR Rate            
Debt Instrument [Line Items]            
Variable rate spread (percent)   2.75%        
New Credit Facilities | Maximum | Base Rate            
Debt Instrument [Line Items]            
Variable rate spread (percent)   1.75%        
New Credit Facilities | New Term Loan            
Debt Instrument [Line Items]            
Face amount of instrument   $ 275,000,000.0        
Term of debt instrument   5 years        
Proceeds from line of credit       275,000,000    
Repayments of line of credit       30,000,000    
New Credit Facilities | Revolving Credit Facility            
Debt Instrument [Line Items]            
Face amount of instrument   $ 200,000,000.0        
Proceeds from issuance of debt   65,000,000        
Debt issuance costs   4,800,000        
Repayments of line of credit       65,000,000    
Remaining borrowing capacity       198,500,000    
Outstanding standby letters of credit       1,500,000    
Existing Credit Facilities | New Term Loan            
Debt Instrument [Line Items]            
Debt extinguished   80,000,000        
Debt issuance costs written off   $ 2,800,000        
Existing Credit Facilities | Senior Unsecured Notes            
Debt Instrument [Line Items]            
Debt issuance costs written off     $ 2,100,000 2,100,000    
Debt outstanding     200,000,000   $ 200,000,000  
Call premium incurred on extinguishment of debt     $ 9,800,000 $ 9,800,000