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Discontinued Operations - Consolidated Statements of Cash Flows for the Discontinued Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Impairment expense - Disc Ops $ 46,000 $ 100,000 $ 145,700 $ 0 $ 0
Depreciation of fixed assets     102,451 154,599 197,585
Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Depreciation of fixed assets       44,000 72,000
Capital expenditures     (23,000) (68,000) (41,000)
Discontinued Operations | AMECO          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Impairment expense - Disc Ops     145,700 0 0
Depreciation of fixed assets     0 44,295 72,137
Amortization of stock-based awards     56 123 103
Capital expenditures     $ (23,430) $ (68,048) $ (40,856)