CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 6,514	$ (4,178)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	14,478	16,640
Provision for (recovery of) doubtful accounts	168	(963)
Deferred income taxes	131	0
Net gains on sales of assets	(50)	(3,202)
ESOP and share-based compensation expense	2,134	1,906
Realized and Unrealized Gains (Losses) on Derivatives And Investments, Net	1,949	7,038
Change in operating assets and liabilities:
Restricted cash	4,508	(1,987)
Purchases of trading securities held for investment	(2,963)	(4,188)
Proceeds from sales of trading securities held for investment	2,207	3,417
Accounts and notes receivable	(2,106)	(2,053)
Inventories	(5,608)	(2,404)
Income tax receivable	251	289
Prepaid expenses and other assets	(85)	558
Accounts payable	2,361	3,885
Accrued payroll expenses and other current liabilities	(2,581)	(3,702)
Accrued postretirement benefits	(670)	351
Other long-term liabilities	(211)	(1,302)
Net cash provided by operating activities	20,427	10,105
Cash flows from investing activities:
Purchases of property, plant and equipment	(12,128)	(6,396)
Proceeds from sales of property, plant and equipment	333	3,911
Net cash used in investing activities	(11,795)	(2,485)
Cash flows from financing activities:
Proceeds from revolving credit facility	22,550	15,000
Repayments on revolving credit facility	(24,300)	(19,750)
Payments of capital lease obligations	(1,821)	(1,558)
Proceeds from stock option exercises	125	0
Net cash used in financing activities	(3,446)	(6,308)
Net increase in cash and cash equivalents	5,186	1,312
Cash and cash equivalents at beginning of year	2,678	3,906
Cash and cash equivalents at end of year	$ 7,864	$ 5,218