Stock Compensation Plans (Details)	6 Months Ended
	Jul. 31, 2013
Available for Grant
Balances at the beginning of the period (in shares)	7,867,788
Additional Shares Authorized (in shares)	5,046,017
Options forfeited and expired (in shares)	226,285
RSUs granted (in shares)	(1,055,713)
Shares withheld related to net share settlement of RSUs	11,618
RSU's forfeited and expired (in shares)	114,713
Balances at the end of the period (in shares)	12,210,708