Consolidated Statements of Earnings and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Consolidated Statements of Earnings and Comprehensive Income
Net sales	$ 230,236	$ 189,346	$ 667,269	$ 564,044
Cost of sales	148,345	122,067	429,970	359,417
Gross profit	81,891	67,279	237,299	204,627
Selling, general and administrative expenses	35,756	32,327	105,377	88,231
Income from operations	46,135	34,952	131,922	116,396
Interest expense, net	(4,680)	(5,836)	(20,748)	(18,181)
Other income (expense), net	(563)	1,157	1,170	616
Income before provision for income taxes	40,892	30,273	112,344	98,831
Provision for income taxes	(13,866)	(7,980)	(37,504)	(33,637)
Net income	27,026	22,293	74,840	65,194
Other Comprehensive Income, net	1,098	(76)	(4,343)	(389)
Comprehensive income	$ 28,124	$ 22,217	$ 70,497	$ 64,805
Net income per share:
Basic (in dollars per share)	$ 0.29	$ 0.24	$ 0.80	$ 0.71
Diluted (in dollars per share)	$ 0.28	$ 0.23	$ 0.78	$ 0.68
Weighted average shares outstanding:
Basic (in shares)	93,556	92,486	92,985	91,815
Diluted (in shares)	95,924	96,068	95,579	95,554