Leases Other lease information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ 37,259
Operating Lease, Liability	$ 405,867
Operating Lease, Weighted Average Remaining Lease Term	6 years 9 months 10 days
Operating Lease, Weighted Average Discount Rate, Percent	4.06%
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 435,225