Employee Benefit Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plan, Company's portion vested at time of match (as a percent)	100.00%
Employee benefit plan expense	$ 1,382	$ 1,049	$ 824
Participant's first 3% of deferrals
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plan, Company match (as a percent)	100.00%
Participant's second 2% of deferrals
Defined Contribution Plan Disclosure [Line Items]
Employee benefit plan, Company match (as a percent)	50.00%