XML 52 R59.htm IDEA: XBRL DOCUMENT v2.4.0.6
Preferred Stock (Details) (Series E Preferred Stock [Member])
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Term 1 [Member]
Dec. 31, 2011
Term 1 [Member]
Jun. 30, 2012
Term 2 [Member]
Dec. 31, 2011
Term 2 [Member]
Jun. 30, 2012
Term 3 [Member]
Dec. 31, 2011
Term 3 [Member]
Dec. 31, 2011
Term 4 [Member]
Jun. 30, 2012
Minimum [Member]
Term 1 [Member]
Jun. 30, 2012
Minimum [Member]
Term 2 [Member]
Jun. 30, 2012
Minimum [Member]
Term 3 [Member]
Jun. 30, 2012
Minimum [Member]
Term 4 [Member]
Jun. 30, 2012
Maximum [Member]
Term 2 [Member]
Jun. 30, 2012
Maximum [Member]
Term 3 [Member]
Dividends, Preferred Stock [Abstract]                            
Dividend Annualized Period   Dec. 31, 2011 Aug. 11, 2011 Dec. 31, 2013 Jan. 01, 2012 Feb. 07, 2016 Jan. 01, 2014 Feb. 08, 2016            
Redemption Redemption                          
Preferred stock, interest rate, percentage                 5.00% 1.00% 1.00% 9.00% 5.00% 7.00%