Leases Lease expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lease expense [Abstract]
Operating Lease, Expense	$ 32,100	$ 94,800
Operating lease expense	34,166	95,555
Variable lease expense	42,918	121,293
Total lease expense	$ 8,752	$ 25,738