Leases - Lease Cost and Other Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
Cash Flow, Operating Activities, Lessee [Abstract]
Cash paid for operating lease liabilities	$ 57,912
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 25,137
Weighted average remaining lease term:
Operating leases (in years)	4 years 10 months 24 days
Operating Leases, Weighted Average Discount Rate, Percent [Abstract]
Operating leases (percent)	3.00%