CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 5,679	$ 2,839
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,721	18,554
Provision for doubtful accounts	432	186
Restructuring and other transition expenses, net of payments	(1,939)	2,679
Deferred income taxes	72	96
Net (gains) losses from sales of assets	(5,604)	346
ESOP and share-based compensation expense	3,488	4,294
Net losses (gains) on derivative instruments and investments	11,839	(7,058)
Change in operating assets and liabilities:
Restricted cash	1,002	(7,192)
Purchases of trading securities held for investment	(5,938)	(3,209)
Proceeds from sales of trading securities held for investment	4,909	2,151
Accounts and notes receivable	(6,503)	(2,255)
Inventories	(4,452)	13,659
Income tax receivable	(70)	(443)
Derivative (assets) liabilities, net	(11,580)	1,308
Prepaid expenses and other assets	865	1,287
Accounts payable	(997)	(15,166)
Accrued payroll expenses and other current liabilities	3,209	(6,207)
Accrued postretirement benefits	(384)	(691)
Other long-term liabilities	(337)	(666)
Net cash provided by operating activities	9,412	4,512
Cash flows from investing activities:
Acquisition of business	0	(1,200)
Purchases of property, plant and equipment	(16,193)	(13,563)
Purchases of construction-in-progress assets under Texas facility lease	13,492	0
Proceeds from sales of property, plant and equipment	5,990	214
Net cash used in investing activities	(23,695)	(14,549)
Cash flows from financing activities:
Proceeds from revolving credit facility	314	59,748
Repayments on revolving credit facility	(86)	(50,200)
Proceeds from Texas facility lease financing	13,492	0
Payment of financing costs	(8)	(244)
Payments of capital lease obligations	(2,710)	(2,999)
Proceeds from stock option exercises	1,610	1,267
Tax withholding payment related to net share settlement of equity awards	159	116
Net cash provided by financing activities	12,453	7,456
Net decrease in cash and cash equivalents	(1,830)	(2,581)
Cash and cash equivalents at beginning of period	15,160	11,993
Cash and cash equivalents at end of period	13,330	9,412
Supplemental disclosure of non-cash investing and financing activities:
Equipment acquired under capital leases	190	55
Net change in derivative assets and liabilities included in other comprehensive income (loss)	5,929	(21,167)
Construction-in-progress assets under Texas facility lease	5,662	0
Texas facility lease obligation	5,662	0
Non-cash additions to equipment	1,576	148
Non-cash portion of earnout recognized	$ 335	$ 0