CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ 12,132	$ (8,462)	$ (26,576)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	27,334	32,542	32,113
Provision for (recovery of) doubtful accounts	80	(757)	(980)
Deferred income taxes	137	74	(78)
Impairment losses on goodwill and intangible assets	0	92	5,585
Net gains from sales of assets	(3,814)	(4,467)	(268)
ESOP and share-based compensation expense	4,692	3,563	3,287
Net (gains) losses on derivative instruments and investments	(4,276)	11,132	6,175
Change in operating assets and liabilities:
Restricted cash	8,084	(6,472)	(1,153)
Purchases of trading securities held for investment	(5,915)	(9,049)	(13,576)
Proceeds from sales of trading securities held for investment	4,290	7,633	18,267
Accounts and notes receivable	2,248	(2,429)	3,745
Inventories	(14,439)	5,115	13,236
Income tax receivable	181	353	(314)
Derivative assets, net	3,932	0	0
Prepaid expenses and other assets	(661)	(156)	(860)
Accounts payable	17,526	1,773	(13,441)
Accrued payroll expenses and other current liabilities	2,574	(8,785)	(4,239)
Accrued postretirement benefits	(1,905)	(6,451)	3,530
Other long-term liabilities	695	6,678	(6,320)
Net cash provided by operating activities	52,895	21,927	18,133
Cash flows from investing activities:
Purchases of property, plant and equipment	(25,267)	(15,894)	(17,498)
Proceeds from sales of property, plant and equipment	4,536	5,666	3,037
Net cash used in investing activities	(20,731)	(10,228)	(14,461)
Cash flows from financing activities:
Proceeds from revolving credit facility	44,806	43,990	17,250
Repayments on revolving credit facility	(65,454)	(54,761)	(21,200)
Payments of capital lease obligations	(3,681)	(3,359)	(1,897)
Proceeds from stock option exercises	1,480	1,203	0
Net cash used in financing activities	(22,849)	(12,927)	(5,847)
Net increase (decrease) in cash and cash equivalents	9,315	(1,228)	(2,175)
Cash and cash equivalents at beginning of year	2,678	3,906	6,081
Cash and cash equivalents at end of year	11,993	2,678	3,906
Supplemental disclosure of cash flow information:
Cash paid for interest	1,258	1,783	2,123
Cash paid for income taxes	361	370	317
Supplemental disclosure of non-cash investing activities:
Equipment acquired under capital leases	1,217	626	9,508
Net change in derivative assets and liabilities included in other comprehensive income	17,524	(7,921)	0
Non-cash additions to equipment	$ 142	$ 0	$ 0