Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May. 31, 2015	May. 31, 2014
Receivables, allowances	$ 3,085	$ 3,043
Other intangible assets, accumulated amortization	$ 47,547	$ 35,506
Preferred shares, without par value	$ 0	$ 0
Preferred shares, shares authorized	1,000,000	1,000,000
Preferred shares, shares issued	0	0
Preferred shares, shares outstanding	0	0
Common stock, without par value	$ 0	$ 0
Common shares, authorized	150,000,000	150,000,000
Common shares, shares issued	64,141,478	67,408,484
Common shares, shares outstanding	64,141,478	67,408,484
Accumulated other comprehensive income (loss), taxes	$ 16,909	$ 8,043