Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

 v2.3.0.11
Subsequent Events (Details) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended
Aug. 31, 2011
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Aug. 01, 2011
Subsequent Events (Textuals) [Abstract]            
Dividends declared per share $ 0.20 $ 0.20 $ 0.10 $ 0.33 $ 0.20  
Cash dividends, date payable           8/29/2011