Employee Stock Option And Retirement Plans (Tables)

12 Months Ended

Aug. 31, 2011

Employee Stock Option And Retirement Plans [Abstract]

Schedule Of Stock Options Outstanding And Exercisable

	2011				2010				2009
At August 31,	Number of Shares		Weighted Average Exercise Price Per Share		Number of Shares		Weighted Average Exercise Price Per Share		Number of Shares		Weighted Average Exercise Price Per Share
Outstanding at fiscal year end		6,132	$	57.28		6,451	$	47.73		7,553	$	39.51
Exercisable at fiscal year end		2,643	$	38.99		3,331	$	34.49		4,554	$	28.78

Schedule Of Exercise Price Ranges Of Outstanding And Exercisable Options

			Outstanding							Exercisable
Range of Exercise Prices Per Share	Number Outstanding		Weighted Average Remaining Years of Contractual Life		Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value			Number Exercisable		Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
$14.97 – $29.99		1,121		2.31	$	23.93	$	71,721			1,121	$	23.93	$	71,721
$30.00 – $49.99		1,058		2.94	$	40.69	$	49,968			891	$	41.33	$	41,483
$50.00 – $66.45		1,285		3.95	$	62.84	$	32,208			618	$	62.34	$	15,795
$66.46 – $79.99		1,689		5.41	$	66.91	$	35,437			13	$	66.56	$	278
$80.00 – $103.30		979		6.49	$	89.50	$	(1,560	)		0	$	0	$	0
		6,132		4.28	$	57.28	$	187,774			2,643	$	38.99	$	129,277

Summary Of Stock Option Activity

	Number Outstanding			Weighted Average Exercise Price Per Share
Balance at August 31, 2008		8,916		$	40.11
Granted – non performance-based		330			36.00
Granted – non-employee Directors grant		69			42.09
Exercised		(797	)		22.23
Forfeited*		(965	)		58.31
Balance at August 31, 2009		7,553		$	39.51
Granted – non performance-based		329			63.42
Granted – performance-based		1,721			66.91
Granted – non-employee Directors grant		19			66.81
Exercised		(1,980	)		25.77
Forfeited**		(1,191	)		64.47
Balance at August 31, 2010		6,451		$	47.73
Granted – non performance-based		91			89.45
Granted – performance-based		892			89.39
Granted – non-employee Directors grant		15			95.05
Exercised		(1,209	)		32.08
Forfeited		(108	)		66.55
Balance at August 31, 2011		6,132		$	57.28

* In August 2007, the Company granted 896,194 performance-based employee stock options. None of these performance-based stock options granted vested because FactSet did not achieve certain performance levels for both organic ASV and diluted earnings per share during the two fiscal years ended August 31, 2009. As such, these performance-based stock options were recorded as forfeitures in August 2009.

** In August 2008, the Company granted 1,058,981 performance-based employee stock options. None of these performance-based stock options granted vested because FactSet did not achieve certain performance levels for both organic ASV and diluted earnings per share during the two fiscal years ended August 31, 2010. As such, these performance-based stock options were recorded as forfeitures in August 2010.

Change In The Actual Financial Performance Level

Vesting Percentage	Total Unamortized  Stock-based Compensation Expense at August 31, 2011		One-time Adjustment*			Average Remaining Quarterly Expense to be Recognized
0%	$	0	$	(760	)	$	0
20%	$	2,268	$	0		$	136
60%	$	6,804	$	1,520		$	408
100%	$	11,340	$	3,040		$	680

* Amounts represent the one-time cumulative adjustment to be recorded for the November 2010 performance-based option grant if there had been a change in the vesting percentage as of August 31, 2011. The one-time cumulative adjustment increments each quarter by approximately the amount stated in the average remaining quarterly expense to be recognized column.

Summary Of Restricted Stock Award Activity

	Number Outstanding			Weighted Average Grant Date Fair Value Per Award
Balance at August 31, 2009		0		$	0
Granted (restricted stock and stock units)		267		$	61.67
Vested		0		$	0
Canceled/forfeited		(6	)	$	62.85
Balance at August 31, 2010		261		$	61.65
Granted (restricted stock and stock units)		154		$	87.55
Vested		0		$	0
Canceled/forfeited		(8	)	$	69.41
Balance at August 31, 2011		407		$	71.31

Summary Of Share-Based Awards Available For Grant

	Share-based Awards Available for Grant under Employee Stock Option Plans			Share-based Awards Available for Grant under Non-Employee Stock Option Plans
Balance at August 31, 2008		3,489			0
Adoption of the 2008 Non-Employee Plan		0			250
Granted – non performance-based options		(330	)		0
Granted – non-employee Directors grant		0			(69	)
Restricted stock awards granted*		0			0
Share-based awards canceled/forfeited		965			0
Balance at August 31, 2009		4,124			181
Granted – non performance-based options		(329	)		0
Granted – performance-based options		(1,721	)		0
Granted – non-employee Directors grant		0			(19	)
Restricted stock awards granted*		(667	)		0
Share-based awards canceled/forfeited		1,204			0
Share-based awards expired**		(395	)		0
Balance at August 31, 2010		2,216			162
Amendment to the 2004 Stock Option and Award Plan to increase the number of shares available for issuance***		4,000			0
Granted – non performance-based options		(91	)		0
Granted – performance-based options		(892	)		0
Granted – non-employee Directors grant		0			(15	)
Restricted stock awards granted*		(386	)		0
Share-based awards canceled/forfeited		130			0
Balance at August 31, 2011		4,977			147

* For each share awarded as restricted stock under the Company's Option Plans, an equivalent of 2.5 shares were deducted from the available share-based awards balance.

** Represents the remaining stock options available for grant within the Company's 2000 Stock Option plan that expired in January 2010 because they were never granted.

*** As of November 30, 2010, 1.0 million shares remained available for future grant of share-based awards under the Company's 2004 Stock Option and Award Plan, a number that the Company believed to be insufficient to meet its anticipated needs over the next 12 to 18 months. Therefore, the Company's Board of Directors approved, subject to stockholder approval, an amendment to increase the maximum number of shares of FactSet common stock issuable under the 2004 Stock Option and Award Plan by 4,000,000 shares. The stockholders of FactSet voted on and approved the Amended and Restated FactSet Research Systems Inc. 2004 Stock Option and Award Plan at the Company's annual meeting held on December 14, 2010, including the reservation of an additional 4,000,000 shares of common stock for issuance.