Stock-Based Compensation (Tables)

3 Months Ended

Feb. 28, 2012

Stock-Based Compensation [Abstract]

Summary Of Additional Information From Stock Options And Stock Awards

	Three Months Ended February 28,
	2012			2011
Stock options:
Weighted-average grant-date fair value	$	9.82		$	8.29
Options granted		172			331
Options exercised		(1,008	)		(2,108	)
Total intrinsic value of stock options exercised	$	17,259		$	29,112
Total unrecognized compensation expense	$	25,698		$	15,127
Weighted-average remaining recognition period		2.5 years			2.2 years
Stock awards:
Weighted-average grant-date fair value	$	29.42		$	20.95
Stock awards granted		785			564
Stock awards vested		(447	)		(530	)
Total unrecognized compensation expense	$	100,132		$	83,046
Weighted-average remaining recognition period		2.1 years			3.4 years