Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical)

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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Cash dividends declared:    
Common stock, Cash dividend per share $ 0.12 $ 0.1
Series A Preferred Stock [Member]    
Cash dividends declared:    
Preferred stock dividend per share 42.5 42.5
Series B Preferred Stock Variable [Member]    
Cash dividends declared:    
Preferred stock dividend per share $ 14.85 $ 14.68