Leases Leases Lease Costs (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($) Rate	Sep. 30, 2019 USD ($) Rate
Leases [Abstract]
Lease, Cost	$ 8,004	$ 24,634
Operating Lease, Expense	9,318	28,396
Variable Lease, Cost	1,118	2,746
Short-term Lease, Cost	$ 196	$ 1,016
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months	6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent | Rate	3.00%	3.00%