Stockholders' Equity (Preferred Stock) (Details) (USD $) In Millions, except Share data, unless otherwise specified			3 Months Ended		0 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Series A Junior Participating Preferred Stock	Mar. 31, 2013 Series B Preferred Stock	Mar. 07, 2014 Series C Preferred Stock Subsequent Event
Class of Stock [Line Items]
Preferred stock, shares authorized	100,000	100,000
Shares issued during period			90,000	1,000	1,200
Proceeds from issuance of preferred stock					$ 6.0