CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 1,806	$ 2,979
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,424	8,340
Provision for (recovery of) doubtful accounts	73	(922)
Deferred income taxes	37	0
Net gains on sales of assets	(123)	(3,213)
ESOP and share-based compensation expense	904	823
Net losses (gains) on derivatives and investments	1,549	(802)
Change in operating assets and liabilities:
Restricted cash	1,824	1,483
Short-term investments	(1,429)	52
Accounts and notes receivable	1,009	(1,481)
Inventories	(7,816)	(3,943)
Income tax receivable	183	393
Prepaid expenses and other assets	578	120
Accounts payable	1,907	2,268
Accrued payroll expenses and other liabilities	(199)	(1,542)
Accrued postretirement benefits	190	288
Other long-term liabilities	(644)	(1,191)
Net cash provided by operating activities	7,273	3,652
Cash flows from investing activities:
Purchases of property, plant and equipment	(4,757)	(3,572)
Proceeds from sales of property, plant and equipment	292	3,786
Net cash (used in) provided by investing activities	(4,465)	214
Cash flows from financing activities:
Proceeds from revolving credit facility	9,810	4,800
Repayments on revolving credit facility	(9,600)	(9,250)
Payments of capital lease obligations	(768)	(777)
Proceeds from stock option exercises	2	0
Net cash used in financing activities	(556)	(5,227)
Net increase (decrease) in cash and cash equivalents	2,252	(1,361)
Cash and cash equivalents at beginning of year	2,678	3,906
Cash and cash equivalents at end of year	$ 4,930	$ 2,545