Leases Leases (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Lease, Cost	$ 1,588	$ 3,133
Operating Lease, Weighted Average Remaining Lease Term	2 years 1 month	2 years 1 month
Operating Lease, Weighted Average Discount Rate, Percent	5.00%	5.00%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 3,503	$ 3,503
Lessee, Operating Lease, Liability, Payments, Due Year Two	7,091	7,091
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,344	2,344
Lessee, Operating Lease, Liability, Payments, Due Year Four	40	40
Lessee, Operating Lease, Liability, Payments, Due Year Five	40	40
Lessee, Operating Lease, Liability, Payments, Due after Year Five	348	348
Lessee, Operating Lease, Liability, Payments, Due	13,366	13,366
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Operating Lease, Liability	13,366	13,366
Operating Lease, Payments		1,457
Operating Lease, Payments, Use		18
Lease Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Short-term Lease, Cost	329	1,664
Operating Lease, Cost	1,084	1,138
General and Administrative Expense [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Cost	175	331
Property, Plant and Equipment [Member]
Lessee, Lease, Description [Line Items]
Short-term Lease, Cost	2,184	6,168
Operating Lease, Cost	11	18
Lease, Cost	$ 2,195	$ 6,186