Note 13 - Employee Stock Option and Retirement Plans (Details) - Summary of Restricted Stock Award (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	May 31, 2014		Feb. 28, 2014	Nov. 30, 2013
Summary of Restricted Stock Award [Abstract]
Balance	476		455	358
Balance	$ 89.79		$ 87.69	$ 80.43
Granted (restricted stock and stock units)			42	162
Granted (restricted stock and stock units)			$ 100.70	$ 102.27
Vested	(55)	[1]	(17)	(63)
Vested	$ 93.12	[1]	$ 60.28	$ 83.49
Canceled/forfeited	(3)		(4)	(2)
Canceled/forfeited	$ 89.77		$ 97.28	$ 69.27
Balance	418		476	455
Balance	$ 89.34		$ 89.79	$ 87.69

[1] Of the total 55,431 restricted stock awards that vested during the third quarter of fiscal 2014, 29,087 related to awards granted on April 14, 2011 at the grant date price of $103.30. These restricted stock awards cliff vested 100% after three years on April 14, 2014. The awards were amortized to expense over the vesting period using the straight-line attribution method. The remaining 26,344 restricted stock awards that vested during the third quarter were granted on April 8, 2013 and cliff vest 20% annually upon each anniversary date of the grant.