Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Cash flows provided by (used in) operating activities:
Net income	$ 29,906	$ 25,989	$ 24,344
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in fair value of derivative instruments	6,775	(8,549)	2,567
Depreciation and amortization	19,047	18,029	20,324
Loss on redemption of debt			1,700
Provision for losses on accounts receivable	6,481	6,017	10,388
Change in deferred taxes	1,676	12,913	15,831
Changes in operating assets and liabilities net of amounts related to acquisitions:
(Increase) decrease in receivables	(14,074)	5,804	(31,593)
(Increase) decrease in inventories	(20,664)	34,335	(13,189)
Decrease in other assets	4,207	4,226	1,594
Increase (decrease) in accounts payable	(4,555)	3,372	1,943
Increase (decrease) in customer credit balances	(15,878)	11,952	(1,776)
Increase (decrease) in other current and long-term liabilities	5,571	(8,260)	7,269
Net cash provided by operating activities	18,492	105,828	39,402
Cash flows provided by (used in) investing activities:
Capital expenditures	(5,994)	(5,803)	(6,361)
Proceeds from sales of fixed assets	410	503	92
Acquisitions	(1,376)	(39,217)	(9,659)
Net cash used in investing activities	(6,960)	(44,517)	(15,928)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings	111,542	86,252	88,416
Revolving credit facility repayments	(111,542)	(86,252)	(88,416)
Repayment of debt			(82,499)
Proceeds from the issuance of debt			124,188
Debt extinguishment costs			(1,409)
Distributions	(19,313)	(19,525)	(20,677)
Unit repurchase	(15,217)	(19,648)	(10,949)
Increase in deferred charges	(36)	(836)	(6,401)
Net cash provided by (used in) financing activities	(34,566)	(40,009)	2,253
Net increase (decrease) in cash	(23,034)	21,302	25,727
Cash and equivalents at beginning of period	108,091	86,789	61,062
Cash and equivalents at end of period	$ 85,057	$ 108,091	$ 86,789