Acquisitions, Price Allocation (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Business Acquisition Allocation Details [Abstract]
Business acquisition cash	$ 1	$ 0	$ 674
Business acquisition receivables	22,374	4,041	32,371
Business acquisition inventory	27,701	3,594	17,830
Business acquisition purchase price allocation other current assets	105	0	480
Business acquisition property and equipment	8,882	1,900	5,275
Business acquisition goodwill	12,473	1,823	9,483
Business acquisition intangibles	15,760	140	17,658
Business acquisition investments	199	0	0
Total assets acquired	87,495	11,498	83,771
Business acquisition accounts payable	25,026	4,498	25,811
Busniess acquisition accrued expenses	1,591	0	5,299
Business acquisition other liabilities	0	0	10,476
Total liabilities assumed	26,617	4,498	41,586
Net assets acquired	$ 60,878	$ 7,000	$ 42,185