Leases Operating Lease Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 7,788
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	6,731
Lessee, Operating Lease, Liability, Payments, Due Year Two	4,860
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,107
Lessee, Operating Lease, Liability, Payments, Due Year Four	643
Lessee, Operating Lease, Liability, Payments, Due Year Five	0
Lessee, Operating Lease, Liability, Payments, Due	23,129
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	1,470
Operating Lease, Liability	$ 21,659	$ 23,900