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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical)
0 Months Ended 12 Months Ended
May 14, 2012
May 14, 2010
Dec. 31, 2012
Dec. 31, 2010
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY        
Percentage of dividend paid on common stock 5.00% 5.00% 5.00% 5.00%