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Debt - Narrative (Detail)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 18, 2020
USD ($)
Oct. 15, 2018
USD ($)
Sep. 29, 2017
USD ($)
May 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 04, 2020
USD ($)
Jun. 30, 2020
USD ($)
Sep. 30, 2016
USD ($)
Debt Instrument [Line Items]                          
Amount of difference between fair value and book value           $ 24,200,000   $ 24,200,000   $ 29,300,000      
Total cash, cash equivalents and restricted cash           442,400,000   442,400,000   $ 224,900,000      
Gain (loss) on debt extinguishment           (200,000) $ (800,000) (400,000) $ (800,000)        
Interest paid, net of interest capitalized           18,600,000 27,000,000.0 86,400,000 112,500,000        
Interest income from investments/other           $ 200,000 $ 600,000 $ 1,100,000 $ 2,300,000        
Term Loan                          
Debt Instrument [Line Items]                          
Maturity date   Jan. 15, 2024           Jan. 15, 2024   Jan. 15, 2024      
Debt instrument, interest rate           5.16%   5.16%   6.80%      
Principal payments   $ 1,400,000                      
Principal payments term               quarterly          
Borrowings under credit facility [1]           $ 536,900,000   $ 536,900,000   $ 540,300,000      
Term Loan | LIBOR                          
Debt Instrument [Line Items]                          
Interest rate margin on borrowings   5.00%                      
Term Loan | Base Rate                          
Debt Instrument [Line Items]                          
Interest rate margin on borrowings   4.00%                      
ABL Credit Facility                          
Debt Instrument [Line Items]                          
Maturity date   Sep. 29, 2022                      
Credit facility maximum borrowing capacity     $ 800,000,000.0                   $ 800,000,000.0
Line of credit borrowing capacity description               The amount available to be borrowed under the ABL Credit Facility is equal to the lesser of (a) $800.0 million and (b) a borrowing base formula based on the amount of accounts receivable, inventory, machinery, equipment and, if we were to so elect in the future subject to the satisfaction of certain conditions, fee-owned real estate of ours and our material domestic subsidiaries, subject to certain eligibility criteria and advance rates (collectively, the “Borrowing Base”). The aggregate amount of real estate, machinery and equipment that can be included in the Borrowing Base formula cannot exceed $200.0 million.          
Line of Credit Facility, Maximum Borrowing Base Capacity     $ 200,000,000.0                    
Borrowings under credit facility         $ 450,000,000 410,000,000.0   $ 410,000,000.0   $ 42,000,000.0   $ 410,000,000  
Borrowing capacity available under credit agreement           127,800,000   $ 127,800,000          
Weighted average interest rate on borrowings               1.80% 3.70%        
ABL Credit Facility | Revolving Credit Facility                          
Debt Instrument [Line Items]                          
Fixed charge coverage ratio     1.0                    
ABL Credit Facility | Minimum                          
Debt Instrument [Line Items]                          
Unused line fee     0.25%                    
ABL Credit Facility | Maximum                          
Debt Instrument [Line Items]                          
Unused line fee     0.375%                    
ABL Credit Facility | Base Rate | Minimum                          
Debt Instrument [Line Items]                          
Interest rate margin on borrowings     0.25%                    
ABL Credit Facility | Base Rate | Maximum                          
Debt Instrument [Line Items]                          
Interest rate margin on borrowings     0.50%                    
ABL Credit Facility | Eurocurrency                          
Debt Instrument [Line Items]                          
Credit facility maximum borrowing capacity     $ 800,000,000.0                    
ABL Credit Facility | Eurocurrency | Minimum                          
Debt Instrument [Line Items]                          
Interest rate margin on borrowings     1.25%                    
ABL Credit Facility | Eurocurrency | Maximum                          
Debt Instrument [Line Items]                          
Interest rate margin on borrowings     1.50%                    
7.875% Notes Due 2021                          
Debt Instrument [Line Items]                          
Aggregate principal amount of notes purchased           $ 11,200,000   $ 67,600,000          
Maturity date           Mar. 15, 2021   Mar. 15, 2021          
7.875% Notes Due 2021 | Scenario Forecast                          
Debt Instrument [Line Items]                          
Debt instrument, redemption of remaining aggregate principal amount outstanding                     $ 83,300,000    
7.00% Notes Due 2022                          
Debt Instrument [Line Items]                          
Maturity date         Feb. 15, 2022 Feb. 15, 2022              
Aggregate principal amount of notes purchased         $ 6,600,000 $ 3,300,000   $ 3,300,000          
7.625% Notes Due 2020, 7.875% Notes Due 2021 and 8.875% Debentures due 2021                          
Debt Instrument [Line Items]                          
Aggregate principal amount of notes purchased           70,200,000   $ 70,200,000          
7.625% Notes Due June 15, 2020                          
Debt Instrument [Line Items]                          
Maturity date               Jun. 15, 2020          
Aggregate principal amount of notes purchased           1,300,000   $ 1,300,000          
8.875% Debentures due 2021                          
Debt Instrument [Line Items]                          
Maturity date               Apr. 15, 2021          
Aggregate principal amount of notes purchased           $ 1,300,000   $ 1,300,000          
6.00% Notes Due 2024                          
Debt Instrument [Line Items]                          
Maturity date         Apr. 01, 2024                
Aggregate principal amount of notes purchased         $ 20,000,000.0                
7.00% Notes Due 2022 and 6.00% Notes Due 2024                          
Debt Instrument [Line Items]                          
Gain (loss) on debt extinguishment         200,000                
Senior Secured Term Loan B | Term Loan Credit Agreement                          
Debt Instrument [Line Items]                          
Debt instrument, aggregate principal amount   $ 550,000,000.0                      
Refinancing Transactions                          
Debt Instrument [Line Items]                          
Debt instrument, aggregate principal amount exchanged $ 246,200,000       277,000,000.0                
Premium (discount) on debt modification 1,000,000.0       (20,000,000)                
Fees paid         $ 300,000                
Refinancing Transactions | 7.875% Notes Due 2021                          
Debt Instrument [Line Items]                          
Debt instrument, aggregate principal amount exchanged 16,400,000                        
Refinancing Transactions | 7.00% Notes Due 2022                          
Debt Instrument [Line Items]                          
Debt instrument, aggregate principal amount exchanged 25,800,000                        
Refinancing Transactions | 8.875% Debentures due 2021                          
Debt Instrument [Line Items]                          
Debt instrument, aggregate principal amount exchanged $ 3,300,000                        
Refinancing Transactions | 6.50% Notes Due 2023                          
Debt Instrument [Line Items]                          
Maturity date Nov. 15, 2023       Nov. 15, 2023                
Debt instrument, aggregate principal amount exchanged $ 161,600,000       $ 54,000,000.0                
Debt instrument, interest rate 6.50%                        
Refinancing Transactions | 6.00% Notes Due 2024                          
Debt Instrument [Line Items]                          
Maturity date Apr. 01, 2024       Apr. 01, 2024                
Debt instrument, aggregate principal amount exchanged $ 39,100,000       $ 177,400,000                
Debt instrument, interest rate 6.00%                        
Refinancing Transactions | 8.25% Notes Due 2027                          
Debt Instrument [Line Items]                          
Maturity date Jul. 01, 2027                        
Debt instrument, interest rate 8.25%                        
Debt instrument, aggregate principal amount $ 244,900,000                        
Refinancing Transactions | 6.625% Debentures Due 2029                          
Debt Instrument [Line Items]                          
Maturity date       Apr. 15, 2029 Apr. 15, 2029                
Debt instrument, aggregate principal amount exchanged       $ 9,000,000.0 $ 45,600,000                
Debt instrument, interest rate         6.625%                
Refinancing Transactions | 8.50% Debentures Due 2029                          
Debt Instrument [Line Items]                          
Maturity date         Apr. 15, 2029                
Debt instrument, interest rate         8.50%                
Debt instrument, aggregate principal amount         $ 297,000,000.0                
Refinancing Transactions | 8.820% Debentures Due April 15, 2031                          
Debt Instrument [Line Items]                          
Maturity date       Apr. 15, 2031                  
Debt instrument, aggregate principal amount exchanged       $ 14,500,000                  
Debt instrument, interest rate       8.82%                  
Refinancing Transactions | 8.500% Notes Due April 15, 2029                          
Debt Instrument [Line Items]                          
Debt instrument, aggregate principal amount exchanged       $ 21,200,000                  
Premium (discount) on debt modification       2,100,000                  
Fees paid       $ 200,000                  
[1] As of September 30, 2020 and December 31, 2019, the interest rate on the Term Loan due January 15, 2024 was 5.16% and 6.80%, respectively.