Leases Additional Lease Disclosure (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Operating Lease, Payments	$ 17,071
Finance Lease, Principal Payments	759
Finance leases, finance cash flows	442
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	2,807
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 9,476
Operating Lease, Weighted Average Remaining Lease Term	5 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	11 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	4.70%
Finance Lease, Weighted Average Discount Rate, Percent	9.70%