Income Taxes (Tables)

12 Months Ended

May 31, 2012

Income Taxes

Schedule of components of provision for income taxes on pre-tax income

	For the Year Ended May 31,
	2012			2011			2010
Current:
Federal	$	(9,777	)	$	(8,580	)	$	21,649
State		(450	)		1,500			1,800
Foreign		2,952			1,800			1,400
		(7,275	)		(5,280	)		24,849
Deferred		32,755			38,861			(3,863	)
	$	25,480		$	33,581		$	20,986

Schedule of reasons for difference between the provision for income taxes on pre-tax income from the amount computed by applying the U.S. federal statutory tax rate

	For the Year Ended May 31,
	2012			2011			2010
Provision for income taxes at the federal statutory rate	$	32,728		$	36,193		$	22,466
Tax benefits on domestic production activities		—			—			(1,673	)
State income taxes, net of federal benefit and refunds		(3,465	)		910			1,056
Research and development credit		(850	)		(350	)		(418	)
Leveraged lease		—			—			(1,517	)
Noncontrolling interest		(107	)		—			499
Settlement of tax examinations		—			(3,531	)		—
Federal adjustments		(3,300	)		—			—
Other		474			359			573
Provision for income taxes	$	25,480		$	33,581		$	20,986

Schedule of components of deferred tax liabilities and assets

	May 31,
	2012			2011
Deferred tax assets-current attributable to:
Inventory costs	$	11,268		$	17,145
Employee benefits		6,036			5,793
Allowance for doubtful accounts		2,114			2,109
AMT, NOL and FTC carrybacks		7,332			8,400
Advanced billings and other		(4,112	)		(9,864	)
Total net deferred tax assets-current	$	22,638		$	23,583
Deferred tax assets-noncurrent attributable to:
Postretirement benefits	$	19,585		$	12,847
Bond hedge		3,086			6,733
Foreign intangible assets		39,551			—
Other		4,765			—
Total deferred tax assets-noncurrent	$	66,987		$	19,580
Total deferred tax assets	$	89,625		$	43,163
Deferred tax liabilities attributable to:
Depreciation	$	(119,049	)	$	(104,202	)
Convertible notes		(7,039	)		(13,700	)
Capitalized program development costs		(17,256	)
Foreign intangible assets		(39,551	)		—
Total deferred tax liabilities	$	(182,895	)	$	(117,902	)
Net deferred tax liabilities	$	(93,270	)	$	(74,739	)