Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 22, 2014
Jul. 30, 2013
Sep. 30, 2016
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
May 27, 2016
Sep. 30, 2015
Jan. 26, 2015
Apr. 18, 2013
Debt Instrument [Line Items]                      
Payments of debt issuance costs         $ 0 $ (1,996,000) $ (7,630,000)        
Repayments of long-term debt         0 30,000,000 435,000,000        
Write off of Deferred Debt Issuance Cost     $ 1,100,000                
Interest Expense         45,812,000 45,155,000 44,265,000        
Loss on extinguishment of debt         0 0 $ (30,152,000)        
Debt issuance costs     $ 2,200,000 $ 1,400,000              
Total debt         585,000,000 585,000,000          
Deferred Finance Costs, Noncurrent, Net         (8,674,000) (10,202,000)          
Total long-term debt         576,326,000 574,798,000          
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       $ 5,500,000              
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 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]                      
Debt instrument fixed interest rate                 9.125%    
Repayments of long-term debt $ 416,200,000                    
Term Loan [Member]                      
Debt Instrument [Line Items]                      
Line of Credit, Current                   $ 30,000,000  
2015 Secured Credit Agreement [Member]                      
Debt Instrument [Line Items]                      
Deferred acquisition costs         1,200,000            
Debt issuance costs         $ 300,000            
Senior secured credit facility               $ 100,000,000   $ 200,000,000  
Unsecured Debt [Member]                      
Debt Instrument [Line Items]                      
Increase in the amount of term loan or revolving credit facility   $ 45,000,000                  
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             $ 3,200,000