Leases Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	$ 1,106	$ 2,209
Variable Lease, Cost	244	487
Finance Lease, Right-of-Use Asset, Amortization	910	1,820
Finance Lease, Interest Expense	699	1,398
Operating Lease [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost	1,350	2,696
Finance Lease [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 1,609	$ 3,218