Significant Accounting Policies (Perpetual Preferred Stock Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Significant Accounting Policies [Abstract]
Preferred Stock, Value, Issued		$ 20.6
Preferred Stock, Shares Issued		20,649
Stock Redeemed or Called During Period, Shares	10,325	10,324
Stock Redeemed or Called During Period, Value	10.4	10.3
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	764,788
Payments for Repurchase of Warrants		$ 2.7