CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash flows provided by (used in) operating activities:
Net income	$ 9,752	$ 2,931
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in fair value of derivative instruments	7,965	7,118
Depreciation and amortization	4,850	3,903
Provision for losses on accounts receivable	1,763	1,450
Change in deferred taxes	864	1,154
Changes in operating assets and liabilities:
Increase in receivables	(106,395)	(79,111)
Increase in inventories	(35,683)	(18,883)
Increase in other assets	(3,799)	(3,202)
Increase in accounts payable	8,878	7,205
Decrease in customer credit balances	(22,603)	(5,316)
Increase in other current and long-term liabilities	13,826	7,986
Net cash used in operating activities	(120,582)	(74,765)
Cash flows provided by (used in) investing activities:
Capital expenditures	(848)	(1,276)
Proceeds from sales of fixed assets	16	241
Acquisitions		(25,863)
Net cash used in investing activities	(832)	(26,898)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings	36,703	46,834
Distributions	(4,781)	(5,072)
Unit repurchase	(4,247)	(12,642)
Deferred charges	(36)	(326)
Net cash provided by financing activities	27,639	28,794
Net decrease in cash and cash equivalents	(93,775)	(72,869)
Cash and cash equivalents at beginning of period	108,091	86,789
Cash and cash equivalents at end of period	$ 14,316	$ 13,920