Note 18 - Income Taxes (Tables)

12 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended June 30
	2013		2012		2011
Domestic	$	126,349	$	160,892	$	136,583
Foreign		567		3,034		(16,010	)
Income before income taxes	$	126,916	$	163,926	$	120,573

	Year Ended June 30
	2013			2012			2011
Current tax expense:
Federal	$	33,318		$	49,798		$	70,894
Foreign		2,868			2,577			952
State and other		2,289			5,941			4,114
Current tax expense		38,475			58,316			75,960
Deferred tax expense (benefit):
Federal		1,035			(12,124	)		(83,700	)
Foreign		(715	)		(755	)		(653	)
State and other		812			(426	)		160
Deferred tax expense (benefit)		1,132			(13,305	)		(84,193	)
Income tax expense (benefit)	$	39,607		$	45,011		$	(8,233	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended June 30
	2013					2012					2011
Expected tax expense	$	44,421		35.0	%	$	57,374		35.0	%	$	42,200		35.0	%
Investment tax credit		-		-			(3,650	)	(2.2	)		(3,888	)	(3.2	)
Domestic manufacturing deduction		(4,346	)	(3.4	)		(4,880	)	(3.0	)		(4,530	)	(3.8	)
Effect of foreign operations		285		0.2			(32	)	-			1,853		1.5
Nondeductible goodwill impairment charge		-		-			849		0.5			-		-
Cellulosic biofuel credit		(4,586	)	(3.6	)		(9,040	)	(5.5	)		(51,458	)	(42.7	)
Change in valuation allowances		1,293		1.0			126		0.1			4,200		3.5
State taxes and other, net		2,540		2.0			4,264		2.6			3,390		2.9
Income tax expense (benefit)	$	39,607		31.2	%	$	45,011		27.5	%	$	(8,233	)	(6.8	)%

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	2013		2012			2011
Uncertain tax position balance at beginning of year	$	2,707	$	2,770		$	2,102
Increases related to current year tax positions		-		-			668
Decreases related to settlements with taxing authorities		-		(63	)		-
Uncertain tax position balance at end of year	$	2,707	$	2,707		$	2,770

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	June 30
	2013			2012
Deferred tax liabilities:
Property, plant and equipment	$	(49,524	)	$	(54,181	)
Inventory		(938	)		(995	)
Other		(5,626	)		(6,971	)
Total deferred tax liabilities		(56,088	)		(62,147	)
Deferred tax assets:
Postretirement benefits		11,003			11,445
Cellulosic Biofuel Credit		66,778			70,359
Net operating losses		9,821			9,676
Nondeductible reserves		1,657			1,552
Credit carryforwards		8,723			12,566
Capital losses		6,362			6,910
Other		11,103			9,238
Total deferred tax assets		115,447			121,746
Valuation allowances		(14,781	)		(13,062	)
Deferred tax assets, net of valuation allowances		100,666			108,684
Net deferred tax asset	$	44,578		$	46,537