Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Preferred Stock Series A [Member]
Dividends declared	$ 0.47	$ 0.47
Preferred Stock Series D [Member]
Dividends declared	$ 0.26	$ 0.26
Retained Earnings [Member] | Preferred Stock Series A [Member]
Dividends declared	$ 0.47	$ 0.47
Retained Earnings [Member] | Preferred Stock Series D [Member]
Dividends declared	$ 0.26	$ 0.26