XML 53 R41.htm IDEA: XBRL DOCUMENT v3.21.2
Property and Equipment - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Depreciation, Amortization and Accretion Expenses [Member]        
Property Plant And Equipment [Line Items]        
Impairment charges. Property, Plant, and Equipment $ 2.9 $ 0.3 $ 5.2 $ 5.5