Leases Operating Lease Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 4,962
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	6,125
Lessee, Operating Lease, Liability, Payments, Due Year Two	4,242
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,117
Lessee, Operating Lease, Liability, Payments, Due Year Four	645
Lessee, Operating Lease, Liability, Payments, Due Year Five	0
Lessee, Operating Lease, Liability, Payments, Due	19,091
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	1,162
Operating Lease, Liability	17,929	$ 23,900
Operating Lease, Liability, Current	8,381		$ 0
Operating Lease, Liability, Noncurrent	$ 9,548		$ 0