Subsequent Event (Details) (USD $) In Millions, except Per Share data, unless otherwise specified			0 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Aug. 07, 2013 Subsequent Event [Member]	Aug. 07, 2013 Common Warrant [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, par value	$ 0.50	$ 0.50	$ 0.50
Class of Warrant or Right, Exercise Price of Warrants or Rights				40.00
Ratio of Common Stock to Warrant			0.14771
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				3