Leases Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating leases:
Operating lease right-of-use asset	$ 18,068	$ 0
Current operating lease liability	6,168
Operating lease liability - less current portion	12,921
Total operating lease liability	19,089	19,089
Finance leases:
Property and equipment, at cost	1,842
Accumulated depreciation	(980)
Property and equipment, net	862
Current finance lease liability	326
Finance lease liability - less current portion	562
Total finance lease liability	$ 888	$ 888
Weighted Average Remaining Lease Term (in years):
Operating leases	4 years 8 months 8 days
Finance leases	2 years 10 months 2 days
Weighted Average Discount Rate:
Operating leases	5.22%
Finance leases	5.06%