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Supplemental Cash Flow for Discontinued Operations (Details) - Discontinued Operations, Disposed of by Sale - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Cash provided by operating activities—discontinued operations $ 0 $ 3,057
Cash used in investing activities—discontinued operations $ 0 $ (535)