Consolidated Statements Of Comprehensive Income (loss) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Jun. 30, 2011
Net income (loss)	$ 10,635	$ 1,624	$ (1,313)
Company sponsored benefit plans:
Change in translation adjustment on non-consolidated foreign subsidiary	(41)	7	20
Commodity derivative activity:
Net losses from cash flow hedges	(1,252)	(286)
Losses from cash flow hedges reclassified to cost of sales	539	186
Losses from de-designated cash flow hedges reclassified to cost of sales		27
Ineffective portion of cash flow hedges reclassified to cost of sales	586	200
Other comprehensive income (loss)	(1,020)	802	2,812
Comprehensive income	9,615	2,426	1,499
Change In Pension Plans [Member]
Company sponsored benefit plans:
Change in Pension Plans and Post Employment Benefits	(1,142)	583	1,257
Change In Post Employment Benefits [Member]
Company sponsored benefit plans:
Change in Pension Plans and Post Employment Benefits	$ 290	$ 85	$ 1,535