Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 3,586	$ 583	$ 12,614	$ 734
Effective tax rate	38.00%	6.00%	38.00%	3.00%
Federal
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 3,200		$ 11,900
State
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 400		$ 700