Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Operating cash flows information:
Cash paid for amounts included in the measurement of lease liabilities	$ 30,521	$ 92,744
Non-cash activity:
Right of use assets obtained in exchange for operating lease obligations	$ 7,933	$ 33,016