Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	2 Months Ended	12 Months Ended		15 Months Ended	17 Months Ended
	Dec. 31, 2014	Feb. 29, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Feb. 29, 2016	Dec. 21, 2015	Aug. 04, 2015	Oct. 31, 2014
Shares repurchased, authorized amount									$ 6.0
Shares repurchased, increased authorized amount							$ 2.3	$ 5.2
Stock Repurchased During Period, Shares	0.5		3.1		3.6
Stock Repurchased During Period, Value			$ 7.1	$ 0.8	$ 7.9
Shares available for repurchase			5.6		5.6
Share price							$ 3.20
Subsequent event
Stock Repurchased During Period, Shares		0.9				4.5
Stock Repurchased During Period, Value		$ 2.6				$ 10.5
Remaining shares available for purchase, value		$ 3.0				$ 3.0