Leases Operating Lease Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 2,527
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	6,572
Lessee, Operating Lease, Liability, Payments, Due Year Two	4,641
Lessee, Operating Lease, Liability, Payments, Due Year Three	3,450
Lessee, Operating Lease, Liability, Payments, Due Year Four	644
Lessee, Operating Lease, Liability, Payments, Due Year Five	0
Lessee, Operating Lease, Liability, Payments, Due	17,834
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	1,037
Operating lease liabilities	16,797	$ 23,900
Operating lease liabilities	7,382		$ 0
Long-term operating lease liabilities	$ 9,415		$ 0