Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Effective tax rates, percent	37.00%	45.00%
Expected statutory tax rate, percent	35.00%	35.00%
Deferred Tax Assets, Net, Noncurrent	$ 96,947		$ 85,613
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	9,000
Research Tax Credit Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 1,300