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Segments - Reconciliation of Net Income to Gross Margin (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation Net Income (Loss) to Gross Margin |  |  |  |
Total gross margin |  | $ 422,544 | $ 497,777 | $ 509,247
Less: |  |  |  |
Selling, general and administrative |  | 107,167 | 105,100 | 117,727
Depreciation and amortization |  | 178,946 | 193,138 | 188,084
Long-lived and other asset impairment |  | 21,397 | 79,556 | 44,663
Goodwill impairment | $ 99,800 |  | 99,830 |
Restatement and other charges |  |  |  | 445
Restructuring charges |  | 2,903 | 8,450 |
Interest expense |  | 108,135 | 105,716 | 104,681
Debt extinguishment loss |  |  | 3,971 | 3,653
Transaction-related costs |  |  |  | 8,213
(Gain) loss on sale of assets, net |  | (30,258) | (10,643) | (16,016)
Other (income) expense, net |  | (4,707) | (1,359) | (661)
Income (loss) before income taxes |  | $ 38,961 | $ (85,982) | $ 58,458

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity, excluding depreciation and amortization expense. Gross margin is a non-GAAP financial measure. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460 + Details
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