Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Effective income tax rate	36.00%	38.30%
Federal statutory tax rate		35.00%
Deferred tax assets, noncurrent	$ 2,013		$ 0
Valuation allowance	3,500
State Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	4,400
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	11,200
Retained earnings [Member] | Accounting Standards Update 2016-09 [Member]
Operating Loss Carryforwards [Line Items]
Deferred tax assets, noncurrent	$ 700