Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail)

v3.3.1.900
Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail) - USD ($)
9 Months Ended 12 Months Ended
Jan. 22, 2014
Jan. 07, 2014
Jul. 30, 2013
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jan. 26, 2015
Apr. 02, 2014
Apr. 18, 2013
Dec. 14, 2012
Debt Instrument [Line Items]                      
Payments of debt issuance costs         $ (1,996,000) $ (7,630,000) $ (11,172,000)        
Repayments of long-term debt         30,000,000 435,000,000 175,000,000        
Tender offer costs $ 25,800,000                    
Write off of Deferred Debt Issuance Cost         7,700,000            
Amortization of Debt Discount (Premium)         (3,800,000)            
Interest Expense         45,155,000 44,265,000 47,820,000        
Loss on extinguishment of debt         0 (30,152,000) $ (5,218,000)        
Debt issuance costs       $ 2,800,000              
Total debt         585,000,000 615,000,000          
Less current portion         0 10,000,000          
Total long-term debt         585,000,000 605,000,000          
6.75 % Senior Notes [Member]                      
Debt Instrument [Line Items]                      
Aggregate principal amount $ 360,000,000       360,000,000            
Debt instrument fixed interest rate 6.75%                    
Debt issuance costs       7,600,000              
Debt Issuance Cost Net Of Amortization       $ 6,200,000              
Debt Instrument, Redemption Amount Percentage of Principal 35.00%                    
Debt instrument, Redemption Price Percent 106.75%                    
Debt Instrument, Redemption Price After Year Three 103.375%                    
Debt Instrument, Redemption Price After Year Five 101.00%                    
7.50 % Senior Notes [Member]                      
Debt Instrument [Line Items]                      
Aggregate principal amount     $ 225,000,000                
Debt instrument fixed interest rate     7.50%                
Debt Instrument, Redemption Amount Percentage of Principal     35.00%                
Debt instrument, Redemption Price Percent     107.50%                
Debt Instrument, Redemption Price After Year Three     103.75%                
Debt Instrument, Redemption Price After Year Five     101.00%                
7.50% Senior Notes, due August 2020 (Issued July 30, 2013) [Member]                      
Debt Instrument [Line Items]                      
Total debt         225,000,000 360,000,000          
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]                      
Debt Instrument [Line Items]                      
Total debt           225,000,000          
Nine Point One Two Five Percent Senior Notes [Member]                      
Debt Instrument [Line Items]                      
Tender Offer Price for Each 1000 Principal Amount         1,061.98            
Tender Offer Price per Note, Consent Payment   $ 30.00                  
Debt Instrument Face Amount per Note         1,000            
Payments of debt issuance costs $ (453,700,000)                    
Debt instrument fixed interest rate       9.125%              
Repayments of long-term debt 416,200,000                    
Accrued interest 11,700,000                    
Senior Notes                 $ 8,800,000    
Debt Instrument, Redemption Price                 $ 9,600,000    
Redemption Premium         400,000            
Interest Expense         400,000            
Term Note Due December Twenty Seventeen [Member]                      
Debt Instrument [Line Items]                      
Total debt         0 $ 30,000,000          
2015 Secured Credit Agreement [Member]                      
Debt Instrument [Line Items]                      
Deferred acquisition costs         2,400,000            
Debt issuance costs         $ 2,000,000            
Senior secured credit facility               $ 200,000,000.0      
Variation in applicable rate for LIBOR Rate Loan       2.50%              
Variation in applicable rate for LIBOR Rate Loan       4.00%              
Variation in applicable rate for Base Rate Loan       1.50%              
Variation in applicable rate for Base Rate Loan       3.00%              
Unsecured Debt [Member]                      
Debt Instrument [Line Items]                      
Increase in the amount of term loan or revolving credit facility     $ 45,000,000                
2012 Secured Credit Agreement [Member]                      
Debt Instrument [Line Items]                      
Debt issuance costs       $ 800,000              
Senior secured credit facility                     $ 80,000,000
Secured Debt [Member]                      
Debt Instrument [Line Items]                      
Revolving loan outstanding $ 40,000,000                    
Secured Debt [Member] | Goldman Term Loan [Member]                      
Debt Instrument [Line Items]                      
Aggregate principal amount                   $ 125,000,000  
ITS [Member] | Term Note Due April Twenty Eighteen [Member]                      
Debt Instrument [Line Items]                      
Deferred acquisition costs     $ 5,600,000 $ 4,000,000