Shareholders' Equity Share Repurchase Plan Information (Details) - USD ($) $ in Millions	2 Months Ended		10 Months Ended
	Feb. 28, 2015	Mar. 07, 2014	Dec. 31, 2015	Dec. 31, 2014	Feb. 19, 2015	Feb. 07, 2014	Mar. 08, 2013
Stock Repurchased and Retired During Period, Shares	335,251	75,203	743,444	910,990
Stock Repurchase Program, Authorized Amount					$ 50.0	$ 50.0	$ 50.0
Stock Repurchased and Retired During Period, Value	$ 13.3	$ 2.9	$ 25.0	$ 36.7
Preferred stock, shares authorized			10,000,000	10,000,000