Stockholders Equity (Details Textuals) (USD $)	0 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended
	Sep. 30, 2011	Nov. 30, 2008	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2013 Preferred Equity	Dec. 31, 2013 Preferred Equity	Jul. 31, 2013 Common Stock	Nov. 30, 2012 Common Stock	Dec. 31, 2013 Common Stock	Dec. 31, 2012 Common Stock	Nov. 30, 2008 Common Stock
Stockholders' Equity Note [Abstract]
Preferred Stock, Dividend Payment Terms	September 15, 2016
Depositary Shares Issued	2,600,000
Rate On Depositary Shares Issued	8.00%
Liquidation Preference On Depositary Shares	$ 1,000
Depositary Share Per Share Value				$ 25
Depositary Shares Issued As Interest In Eight Percent Perpetual Preferred Stock	On September 14, 2011, the Corporation issued 2,600,000 depositary shares, each representing a 1/40th interest in a share of the Corporation’s 8.00% Perpetual Preferred Stock, Series B, liquidation preference $1,000 per share (the “Series B Preferred Stock”).
Stock Repurchased During Period, Value			$ 1,626,000
Subsidiary Equity Balance			3,100,000,000
Class of Stock [Line Items]
Stock Repurchase Program Authorized Amount					10,000,000		120,000,000	125,000,000
Treasury Stock Shares Acquired						58,000			7,700,000	4,700,000
Treasury Stock Carrying Basis						1,600,000			120,000,000	60,000,000
Remaining Authorized Repurchase Amount									95,000,000
Treasury Stock Acquired Average Cost Per Share									$ 15.57	$ 12.77
Warrants to Purchase shares of common stock		$ 4,000,000
Period warrants are exercisable											exercisable at any time, in whole or in part
Exercise price of warrants											$ 19.77