Common Stock Dividends (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Dividends, Common Stock [Abstract]
Annual dividend approved by Board of Directors	$ 0.00	$ 0.00	$ 1.92	$ 1.88
Common stock, quarterly dividends, per share, declared	$ 0.48		$ 0.48