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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, 2020
Dec. 31, 2019
Dec. 31, 2018
Reconciliation Net Income (Loss) to Gross Margin        
Total gross margin   $ 497,777 $ 509,247 $ 440,074
Less:        
Selling, general and administrative   105,100 117,727 101,563
Depreciation and amortization   193,138 188,084 174,946
Long-lived and other asset impairment   79,556 44,663 28,127
Goodwill impairment $ 99,800 99,830    
Restatement and other charges     445 19
Restructuring charges   8,450    
Interest expense   105,716 104,681 93,328
Debt extinguishment loss   3,971 3,653 2,450
Transaction-related costs     8,213 10,162
(Gain) loss on sale of assets, net   (10,643) (16,016) (5,674)
Other income, net   (1,359) (661) (157)
Income (loss) before income taxes   $ (85,982) $ 58,458 $ 35,310