Quarterly report pursuant to Section 13 or 15(d)

Dividends (Details)

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Dividends (Details) (USD $)
0 Months Ended 3 Months Ended
May 08, 2012
Mar. 31, 2012
Mar. 31, 2011
Dividends [Abstract]      
Paid cash dividends, per share   $ 0.08 $ 0.04
Dividends payable, date declared, day, month and year   May 08, 2012  
Dividends declared per common share $ 0.08 $ 0.08 $ 0.04
Dividends payable, date to be paid, day, month and year   Jun. 04, 2012  
Dividends payable, date of record, day, month and year   May 24, 2012