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Debt Obligations - Narrative (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 01, 2021 | Jun. 30, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest expense |  |  | $ 14,502,000 | $ 13,426,000 | $ 26,109,000 | $ 28,206,000 |
Interest expense, related party |  |  | 4,668,000 | $ 4,586,000 | 8,733,000 | $ 9,736,000 |
Interest payable, current |  | $ 3,400,000 | 3,400,000 |  | 3,400,000 |  | $ 8,500,000
Repayments of financing obligations |  | 10,200,000 |  |  |  |  |
Financing obligation, right-of-use asset, writeoff |  | 48,100,000 |  |  |  |  |
Financing obligation, writeoff |  | 55,200,000 |  |  |  |  |
Loss on extinguishment of financing obligation |  |  | (3,100,000) |  | (3,100,000) |  |
New Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
ABL Facility (Fifth Amendment) | $ 700,000,000.0 |  |  |  |  |  |
Debt instrument, mandatory quarterly amortization payment |  |  | 17,500,000 |  |  |  |
Proceeds from issuance of debt | 674,900,000 |  |  |  |  |  |
Term loan, original issue discount | 21,000,000.0 | 19,600,000 | 19,600,000 |  | 19,600,000 |  |
Debt issuance costs | $ 4,100,000 |  |  |  |  |  |
Payments of financing costs |  |  |  |  | 4,200,000 |  |
Unamortized debt issuance expense |  | 2,500,000 | 2,500,000 |  | 2,500,000 |  |
Term loan, debt issuance costs |  | $ 2,500,000 | $ 2,500,000 |  | $ 2,500,000 |  |
Debt instrument, covenant, leverage ratio to EBITDA, maximum |  | 3.0 | 3.0 |  | 3.0 |  |
New Term Loan | General and administrative |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Payments of financing costs |  |  |  |  | $ 1,700,000 |  |
New Term Loan | LIBOR + |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Rate | 8.50% |  |  |  | 8.50% |  |
New Term Loan | Base Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Rate | 7.50% |  |  |  |  |  |
New Term Loan | Affiliated Entity |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, percent ownership | 38.40% | 29.60% | 29.60% |  | 29.60% |  |
New Term Loan | Affiliated Entity | GoldenTree Asset Management |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, percent ownership | 25.00% | 17.90% | 17.90% |  | 17.90% |  |
New Term Loan | Affiliated Entity | Paulson and Co |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, percent ownership | 7.10% | 7.60% | 7.60% |  | 7.60% |  |
New Term Loan | Affiliated Entity | Mudrick Capital Management |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument, percent ownership | 6.30% | 4.10% | 4.10% |  | 4.10% |  |
Senior Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt issuance costs | $ 100,000 |  |  |  |  |  |
Repayment of debt | 449,600,000 |  |  |  |  |  |
Interest expense | 400,000 |  |  |  |  |  |
Unamortized debt issuance expense |  | $ 100,000 | $ 100,000 |  | $ 100,000 |  |
Term loan, debt issuance costs |  |  |  |  |  |  | $ 400,000
Write off of deferred debt issuance costs |  |  |  |  | 300,000 |  |
Senior Term Loan | LIBOR + |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Rate |  |  |  |  |  |  | 9.00%
Revolving Credit Facility | ABL Facility | Line of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt issuance costs | 2,400,000 |  |  |  |  |  |
Maximum revolver amount | 175,000,000.0 |  |  |  |  |  |
Debt issuance costs, line of credit | $ 900,000 |  |  |  |  |  |
Debt issuance costs, line of credit, balance |  | 3,100,000 | 3,100,000 |  | 3,100,000 |  | $ 2,500,000
Current borrowing capacity |  | $ 77,700,000 | $ 77,700,000 |  | $ 77,700,000 |  |
Debt instrument, covenant, fixed charge coverage ratio required, minimum |  | 1.00 | 1.00 |  | 1.00 |  |
Debt instrument, covenant, remaining borrowing capacity required, minimum |  | $ 14,000,000.0 | $ 14,000,000.0 |  | $ 14,000,000.0 |  |
Debt instrument, covenant, remaining borrowing capacity required for U.S excess availability, minimum |  | $ 10,000,000.0 | $ 10,000,000.0 |  | $ 10,000,000.0 |  |
Revolving Credit Facility | ABL Facility | Line of Credit | LIBOR + |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Rate | 3.00% |  |  |  |  |  |
Line of credit facility, unused capacity, commitment fee percentage | 0.375% |  |  |  |  |  |
Revolving Credit Facility | ABL Facility | Line of Credit | Base Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Rate | 2.00% |  |  |  |  |  |

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- Definition Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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