Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 2,990	$ 8,173
Right-of-use assets obtained in exchange for lease obligations	$ 2,970	$ 10,356