Leases Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating Lease Right Of Use Asset	$ 26,069	$ 0
Operating Lease Liability Current	5,258
Operating Lease Liability Noncurrent	20,231	$ 0
Operating Lease Liability	$ 25,489
Operating Lease Weighted Average Remaining Lease Term 1	6 years 1 month 6 days
Operating Lease Weighted Average Discount Rate Percent	4.65%