Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details Textual)

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Subsequent Events (Details Textual) (USD $)
1 Months Ended 3 Months Ended
Apr. 30, 2012
Mar. 31, 2012
Mar. 31, 2011
Subsequent Events (Textual) [Abstract]      
Dividends declared per share $ 0.30 $ 0.30 $ 0.13
Cash dividends, date payable May 30, 2012