Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 3,642	$ 99	$ 9,028	$ 152
Effective tax rate	36.00%	1.00%	37.00%	1.00%
Federal
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 3,500		$ 8,700
State
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 100		$ 300