|
Common Stock Dividends (Narrative) (Details) (USD $)
|
3 Months Ended | |
|---|---|---|
|
Apr. 30, 2011
|
Apr. 30, 2010
|
|
| Common Stock Dividends | ||
| Annual dividend approved by Board of Directors for 2012 | $ 1.46 | $ 1.21 |
| Percent increase over 2011 dividend | 21.00% | |
| Installments of annual dividend expected to be paid in fiscal 2012 | 4 | |