Commitments and Contingencies (Lease Information) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating lease right-of-use asset	$ 14,817
Current operating lease liability	6,227
Long term operating lease liability	12,566
Total operating lease liability	$ 18,793
Operating leases, weighted average remaining lease term (in years)	3 years 3 months 8 days
Operating leases, weighted average discount rate (percent)	7.00%