CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities:
Net income	$ 53,477	$ 42,580	$ 33,440
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,062	6,284	5,004
Amortization of debt issuance costs	41	65	58
Stock-based compensation	2,157	831	1,088
Deferred income taxes	1,182	597	249
Earnings of equity method investees	(318)	(268)	(220)
(Gain)/loss on disposal of property and equipment	32	0	(11)
Excess tax benefit of exercise of common stock options	(895)	(2,714)	(3,611)
Pension payment	0	0	(2,047)
Other	(206)	(76)	97
Changes in operating assets and liabilities (net of effects of business acquisitions):
Receivables	(48,879)	(23,021)	(14,154)
Inventories	(52,831)	8,553	(41,106)
Prepaid expenses and other current assets	(1,118)	3,398	(2,419)
Accounts payable	50,018	(5,150)	39,781
Accrued expenses	2,516	1,349	717
Net cash provided by operating activities	14,238	32,428	16,866
Cash Flows From Investing Activities:
Business acquisitions, net of cash acquired	(51,718)	(9,000)	(39,645)
Purchases of property and equipment	(7,597)	(12,516)	(4,388)
Proceeds from sales of property and equipment	96	0	0
Other	(646)	(3,993)	(57)
Net cash used in investing activities	(59,865)	(25,509)	(44,090)
Cash Flows From Financing Activities:
Borrowings on credit facilities	539,071	249,978	151,616
Payments on credit facilities	(494,186)	(257,166)	(141,500)
Proceeds from issuance of common stock	562	412	248
Proceeds from exercise of stock options	154	98	403
Excess tax benefit of exercise of common stock options	895	2,714	3,611
Debt issuance costs	(111)	0	(116)
Payment on long-term debt and capital lease obligations	(986)	(3,327)	(477)
Net cash (used in)/provided by financing activities	45,399	(7,291)	13,785
Effect of Exchange Rate on Cash and Cash Equivalents	136	67	48
Net (Decrease)/Increase in Cash and Cash Equivalents	(92)	(305)	(13,391)
Cash and Cash Equivalents at Beginning of Period	606	911	14,302
Cash and Cash Equivalents at End of Period	$ 514	$ 606	$ 911