Share Based Payments (Tables)

12 Months Ended

Apr. 30, 2011

Share Based Payments (Tables) [Abstract]

Summary of the Company's stock option activity and related information

Stock Options: The following table is a summary of the Company’s stock option activity and related information.


				Weighted-Average
	Options			Exercise Price

Outstanding at May 1, 2010		711,987		$	41.06
Exercised		(515,062	)		41.01

Outstanding and exercisable at April 30, 2011		196,925		$	41.18

At April 30, 2011, the weighted-average remaining contractual term for stock options outstanding and exercisable was approximately 2.6 years and the aggregate intrinsic value of these stock options was approximately $6,673.

The total intrinsic value of options exercised during 2011, 2010, and 2009 was approximately $13,355, $5,876, and $2,871, respectively.

Summary of the Company's Restricted shares, Deferred shares, Deferred stock units, and Performance units

Other Equity Awards: The following table is a summary of the Company’s restricted shares, deferred shares, deferred stock units, and performance units.


	Restricted/
	Deferred			Weighted-
	Shares and			Average					Weighted-
	Deferred			Grant Date		Performance			Average
	Stock Units			Fair Value		Units			Fair Value

Outstanding at May 1, 2010		1,078,722		$	44.74		190,010		$	57.37
Granted		303,863			58.32		125,360			77.53
Converted		190,010			57.37		(190,010	)		57.37
Vested		(373,522	)		47.33		—			—
Forfeited		(41,807	)		49.08		—			—

Outstanding at April 30, 2011		1,157,266		$	49.39		125,360		$	77.53

Weighted-Average grant date fair values of the Equity

Restricted/

Deferred

Weighted-

Shares and

Average

Deferred

Grant Date

Performance

Grant Date

Stock Units

Fair Value

Units

Fair Value

2011

303,863

58.32

125,360

77.53

2010

504,580

44.63

190,010

57.37

2009

570,359

42.29

114,440

43.44