Leases (Supplemental Cash Flow Information Leases) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases Supplemental Cash Flow Information [Line Items]
Finance Lease, Interest Payment on Liability	$ 145
Finance Lease, Principal Payments	453
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	11,153
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	1,082
Operating Activities [Member]
Leases Supplemental Cash Flow Information [Line Items]
Operating Lease, Payments	2,575
Investing Activities [Member]
Leases Supplemental Cash Flow Information [Line Items]
Operating Lease, Payments	$ 13,596