Stockholders' Equity Dividends Declared (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2014	Jul. 31, 2013
Dividends Declared [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.38	$ 0.34	$ 0.72	$ 0.66