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Property and Equipment - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Property Plant And Equipment [Line Items]        
Depreciation expense $ 10.8 $ 11.5 $ 32.3 $ 35.1
Property and equipment purchased through accounts payable and accrued liabilities, increased or decreased amount     $ 0.3 $ 6.3