Leases - Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Lessee Disclosure [Abstract]
Cash paid for operating leases included in operating activities	$ 46,263	$ 43,543
Cash paid for finance leases included in operating activities	271	314
Cash paid for finance leases included in financing activities	1,082	3,236
Operating lease right-of-use assets obtained in exchange for lease obligations	15,148	45,474
Noncash lease expense	$ 46,400	$ 43,600