Leases Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use assets	$ 9,255
Accumulated amortization	(352)
Total right-of-use assets	8,903	$ 8,600
Current lease liabilities	517	300	$ 0
Noncurrent lease liabilities	14,117	$ 13,700
Total lease liabilities	$ 14,634
Weighted average remaining lease term
Operating leases (in years)	8 years 4 months 25 days
Weighted average discount rate
Operating leases	5.60%