Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Operations [Abstract]
Net sales	$ 173,863	$ 166,748	$ 326,788	$ 326,684
Costs and expenses:
Cost of sales	105,967	98,594	198,688	196,077
Selling, general and administrative expenses	47,944	43,409	96,634	87,054
Amortization of intangible assets	3,254	3,035	6,407	5,888
Interest expense, net	470	538	961	1,312
Other (income) expenses, net	(376)	125	(848)	(493)
Total costs and expenses	157,259	145,701	301,842	289,838
Earnings before income taxes	16,604	21,047	24,946	36,846
Income tax expense	6,402	7,820	9,537	12,806
Net earnings	$ 10,202	$ 13,227	$ 15,409	$ 24,040
Earnings per share:
Basic - Net earnings	$ 0.38	$ 0.50	$ 0.58	$ 0.91
Diluted - Net earnings	$ 0.38	$ 0.49	$ 0.57	$ 0.90