Condensed Consolidated Statement Of Shareholders' Equity (Unaudited) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2013	Jul. 31, 2012
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share	$ 0.00	$ 0.00	$ 1.88	$ 1.59