Changes In Equity (Tables)

9 Months Ended

Feb. 29, 2012

Changes In Equity [Abstract]

Schedule Of Changes In Total Equity, Shareholders' Equity Attributable To Controlling Interest, And Equity Attributable To Noncontrolling Interest

	Controlling Interest
(in thousands)	Additional Paid-in Capital			Cumulative Other Comprehensive Income (Loss), Net of Tax			Retained Earnings			Total			Non- controlling Interest			Total
Balance at May 31, 2011	$	181,525		$	3,975		$	504,410		$	689,910		$	50,793		$	740,703
Comprehensive income*		—			(3,917	)		63,517			59,600			5,805			65,405
Common shares issued		9,709			—			—			9,709			—			9,709
Stock-based compensation		8,921			—			—			8,921			—			8,921
Purchases and retirement of common shares		(8,672	)		—			(43,448	)		(52,120	)		—			(52,120	)
Dividends paid to noncontrolling interest		—			—			—			—			(9,744	)		(9,744	)
Cash dividends declared		—			—			(25,187	)		(25,187	)		—			(25,187	)
Balance at February 29, 2012	$	191,483		$	58		$	499,292		$	690,833		$	46,854		$	737,687

* The allocation of the components of comprehensive income attributable to controlling and noncontrolling interests is disclosed in "NOTE G - Comprehensive Income."