CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Net revenues	$ 579,561	$ 542,896	$ 381,543
Cost of sales	458,721	449,116	327,712
Gross profit	120,840	93,780	53,831
Selling, general and administrative expense	40,661	41,215	35,470
Research and technical expense	3,285	3,259	2,828
Operating income	76,894	49,306	15,533
Interest income	(188)	(248)	(209)
Interest expense	87	156	150
Income before income taxes	76,995	49,398	15,592
Provision for income taxes	26,813	18,270	6,717
Net income	$ 50,182	$ 31,128	$ 8,875
Net income per share:
Basic (in dollars per share)	$ 4.09	$ 2.55	$ 0.74
Diluted (in dollars per share)	$ 4.07	$ 2.54	$ 0.73
Dividends declared per common share (in dollars per share)	$ 0.88	$ 0.80	$ 0.80