Shareholders' Equity (Details) (USD $) | 0 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Aug. 25, 2011 | Jul. 28, 2011 | May 26, 2011 | Apr. 27, 2011 | Mar. 04, 2011 | Feb. 03, 2011 | Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Oct. 27, 2011
Dividend Declared [Member] | |
Subsequent Event [Line Items] | |||||||||||
Quarterly cash dividend payable | $ 0.08 | ||||||||||
Special cash dividend payable | $ 0.05 | ||||||||||
Declared quarterly cash dividend | $ 0.06 | $ 0.05 | $ 0.03 | ||||||||
Quarterly cash dividend paid | $ 0.06 | $ 0.05 | $ 0.03 | $ 0.06 | $ 0.01 | $ 0.14 | $ 0.03 |