Property and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Property Plant And Equipment [Line Items]
Depreciation expense	$ 10,900	$ 12,200
Amortization expense on finance lease assets	1,070	918
Property and equipment purchased through accounts payable and accrued liabilities, decreased amount	$ 500	$ 4,600