Debt - Narrative (Detail) | Jun. 18, 2020USD ($) | Oct. 15, 2018USD ($) | Sep. 29, 2017USD ($) | May 31, 2020USD ($) | Mar. 31, 2020USD ($) | Sep. 30, 2020USD ($) | Sep. 30, 2019USD ($) | Sep. 30, 2020USD ($) | Sep. 30, 2019USD ($) | Dec. 31, 2019USD ($) | Dec. 04, 2020USD ($) | Jun. 30, 2020USD ($) | Sep. 30, 2016USD ($) |
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 | 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 | | | | | | | | | | $ 800,000,000 |
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 | | | | | | | | | | |
Borrowings under credit facility | | | | | | $ 450,000,000 | 410,000,000 | | $ 410,000,000 | | $ 42,000,000 | | $ 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 | | | | | | | | | | |
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 | | | | | | | | | | |
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. 1, 2024 | | | | | | | | |
Aggregate principal amount of notes purchased | | | | | | $ 20,000,000 | | | | | | | | |
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 | | | | | | | | | | | |
Refinancing Transactions | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Debt instrument, aggregate principal amount exchanged | | $ 246,200,000 | | | | 277,000,000 | | | | | | | | |
Premium (discount) on debt modification | | 1,000,000 | | | | (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 | | | | | | | | |
Debt instrument, interest rate | | 6.50% | | | | | | | | | | | | |
Refinancing Transactions | 6.00% Notes Due 2024 | | | | | | | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | | | | | | | |
Maturity date | | Apr. 1, 2024 | | | | Apr. 1, 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. 1, 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 | $ 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 | | | | | | | | |
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 | | | | | | | | | |
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[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. | |