Note 10. Stock Compensation

As of April 30, 2011, there was $96.0 million of unamortized share-based compensation expense which is expected to be amortized over a weighted-average period of approximately 2.6 years. The intrinsic values of options exercised during the three and six months ended April 30, 2011 were $12.8 million and $27.9 million, respectively. The intrinsic values of options exercised during the three and six months ended April 30, 2010 were $10.4 million and $13.0 million, respectively.

The compensation cost recognized in the unaudited condensed consolidated statements of operations for these stock compensation arrangements was as follows:


	Three Months Ended April 30,						Six Months Ended April 30,
	2011			2010			2011			2010
	(in thousands)
Cost of license	$	1,225		$	1,514		$	2,718		$	3,531
Cost of maintenance and service		277			427			631			1,041
Research and development expense		5,867			5,835			13,710			13,497
Sales and marketing expense		2,537			2,815			5,175			6,514
General and administrative expense		2,760			2,875			5,680			6.117

Stock compensation expense before taxes		12,666			13,466			27,914			30,700
Income tax benefit		(3,400	)		(3,043	)		(7,492	)		(6,938	)

Stock compensation expense after taxes	$	9,266		$	10,423		$	20,422		$	23,762