Leases Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months		$ 8,326
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 6,018
Lessee, Operating Lease, Liability, Payments, Due Year Two	8,713	8,572
Lessee, Operating Lease, Liability, Payments, Due Year Three	6,391	6,489
Lessee, Operating Lease, Liability, Payments, Due Year Four	5,955	5,914
Lessee, Operating Lease, Liability, Payments, Due Year Five	5,795	5,615
Lessee, Operating Lease, Liability, Payments, Due after Year Five	13,390	13,235
Lessee, Operating Lease, Liability, Payments, Due	46,262	$ 48,151
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(7,656)
Operating Lease, Liability	$ 38,606