Share-Based Compensation - Award Activity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options exercised (in shares)			0	50,000
Exercised (weighted averaged exercise price) (in dollars per share)			$ 0.00	$ 0.45
Options vested in period (in shares)			30,768
Aggregate fair value of options vested in period			$ 0.1
Unrecognized compensation cost related to stock options	$ 0.4		$ 0.4
Weighted average period for recognition of compensation cost			1 year 8 months 27 days
Share-based compensation expense	$ 0.4	$ 0.1	$ 0.5	$ 0.2