Leases Leases Supplemental Cash Flow Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating Lease, Payments	$ 4,092
Finance Lease, Interest Payment on Liability	699
Total Lease Payments in Operating Cash Flows	4,791
Finance Lease, Principal Payments	$ 665