Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Depreciation expense	$ 112,400	$ 107,900	$ 103,500
Assets under finance leases	19,400	17,100
Accumulated amortization related to capital leases	15,400	14,200
Depreciation expense related to capital leases	$ 1,225	$ 1,000	$ 1,000