CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (5,835)	$ (17,195)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	24,778	23,831
(Recovery of) provision for doubtful accounts	(890)	880
Deferred income taxes	(111)	0
Net gains on sales of assets	(4,388)	(1,161)
ESOP and share-based compensation expense	2,639	2,519
Net loss on derivatives and investments	9,315	5,131
Change in operating assets and liabilities:
Short-term investments	(9,063)	1,027
Accounts and notes receivable	(1,167)	936
Inventories	(1,291)	3,533
Income tax receivable	622	(377)
Prepaid expenses and other assets	522	81
Accounts payable	4,359	(9,342)
Accrued payroll, expenses and other liabilities	(1,312)	1,102
Accrued postretirement benefits	836	1,130
Other long-term liabilities	(1,416)	(1,083)
Net cash provided by operating activities	17,820	11,012
Cash flows from investing activities:
Purchases of property, plant and equipment	(10,118)	(10,533)
Proceeds from sales of property, plant and equipment	5,556	2,112
Net cash used in investing activities	(4,562)	(8,421)
Cash flows from financing activities:
Proceeds from revolving credit facility	22,550	13,700
Repayments on revolving credit facility	(32,771)	(17,700)
Payments of capital lease obligations	(2,613)	(1,209)
Proceeds from stock option exercises	1,195	0
Net cash used in financing activities	(11,639)	(5,209)
Net increase (decrease) in cash and cash equivalents	1,619	(2,618)
Cash and cash equivalents at beginning of period	3,906	6,081
Cash and cash equivalents at end of period	$ 5,525	$ 3,463