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Cash Dividend Distribution (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Feb. 17, 2012
Cash Dividend Distribution (Textual) [Abstract]      
Cash Dividend Distribution $ 4.8 $ 3.5  
Cash dividend distribution, per share   $ 0.08  
Cash dividend approved     $ 4.8