Share Based Payments (Tables)

6 Months Ended

Oct. 31, 2012

Share-Based Payments [Abstract]

Share based payments

	Three Months Ended		Six Months Ended
	October 31,		October 31,
	2012	2011	2012	2011
Share-based compensation expense included in selling, distribution,
and administrative expenses	$ 6,009	$ 5,593	$ 10,125	$ 10,744
Share-based compensation expense included in other restructuring and merger and integration costs	187	951	386	1,875
Total share-based compensation expense	$ 6,196	$ 6,544	$ 10,511	$ 12,619
Related income tax benefit	$ 2,083	$ 2,236	$ 3,538	$ 4,250