CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 2,874	$ (7,584)
Adjustments to reconcile net income(loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	8,340	7,923
Provision for doubtful accounts	(922)	590
(Gain) loss on sales of assets	(3,213)	98
ESOP and share-based compensation expense	823	790
Net (gain) loss on investments	(802)	2,621
Change in operating assets and liabilities:
Short-term investments	1,232	6,059
Accounts and notes receivable	(1,481)	(1,643)
Inventories	(3,943)	(3,192)
Income tax receivable	374	287
Prepaid expenses and other assets	120	543
Accounts payable	1,863	(3,650)
Accrued payroll, expenses and other liabilities	(834)	(147)
Accrued postretirement benefits	412	327
Other long-term liabilities	(1,191)	(3,055)
Net cash provided by (used in) operating activities	3,652	(33)
Cash flows from investing activities:
Purchases of property, plant and equipment	(3,572)	(2,910)
Proceeds from sales of property, plant and equipment	3,786	198
Net cash used in investing activities	214	(2,712)
Cash flows from financing activities:
Proceeds from revolving credit facility	4,800	8,400
Repayments on revolving credit facility	(9,250)	(6,800)
Payments of capital lease obligations	(777)	(384)
Net cash (used in) provided by financing activities	(5,227)	1,216
Net decrease in cash and cash equivalents	(1,361)	(1,529)
Cash and cash equivalents at beginning of period	3,906	6,081
Cash and cash equivalents at end of period	$ 2,545	$ 4,552