Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease expense	$ 33,436	$ 34,166	$ 105,964	$ 95,555
Variable lease expense	6,419	8,752	21,772	25,738
Total lease expense	$ 39,855	$ 42,918	$ 127,736	$ 121,293