Stock-Based Compensation - Warrants (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Mar. 30, 2015 employee shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($)	Dec. 31, 2016 shares
Performance Based Warrants
Class of Warrant or Right [Line Items]
Number of exercisable warrants (in shares)		0		0
Expense associated with warrants | $		$ 0.1	$ 0.1
Common Stock | 2015 Performance Based Warrant
Class of Warrant or Right [Line Items]
Number of employees who were issued warrants | employee	2
Common Stock | Employee | 2015 Performance Based Warrant
Class of Warrant or Right [Line Items]
Number of shares exercisable when warrants exercise (up to / not to exceed)	54,694
Common Stock | Employee | 2015 Performance Based Warrant, Two
Class of Warrant or Right [Line Items]
Number of shares exercisable when warrants exercise (up to / not to exceed)		27,347
Exercise price of warrants (in dollars per share) | $ / shares		$ 10.97