Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 124,708	$ 127,213
Operating cash flows from finance leases	690	349
Financing cash flows from finance leases	6,386	3,975
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	110,036	133,959
Finance leases	18,248	20,464
Amortization of right of use operating lease assets	$ 113,898	$ 109,884