XML 78 R61.htm IDEA: XBRL DOCUMENT v3.20.4
Property and Equipment - Narratives (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]      
Depreciation expense   $ 2,500,000 $ 6,500,000
Loss on write-down of assets held for sale $ 30,200,000 $ 30,178,000 $ 0