Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows provided by (used in) operating activities:
Net income	$ 61,912	$ 43,843
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	(4,661)	6,428
Depreciation and amortization	16,241	14,332
Provision for losses on accounts receivable	8,862	7,814
Change in deferred taxes	9,051	4,292
Changes in operating assets and liabilities:
Increase in receivables	(78,276)	(71,929)
(Increase) decrease in inventories	24,706	(1,585)
Decrease in other assets	3,955	6,452
Decrease in accounts payable	(7,132)	(7,461)
Decrease in customer credit balances	(43,588)	(52,719)
Decrease in other current and long-term liabilities	14,183	18,903
Net cash provided by (used in) operating activities	5,253	(31,630)
Cash flows provided by (used in) investing activities:
Capital expenditures	(6,510)	(3,133)
Proceeds from sales of fixed assets	139	133
Acquisitions (net of cash acquired of $4,151 and $0, respectively)	(97,950)	(644)
Net cash used in investing activities	(104,321)	(3,644)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings	195,482	111,542
Revolving credit facility repayments	(155,938)	(111,542)
Distributions	(14,737)	(14,460)
Unit repurchases	(1,300)	(13,940)
Deferred charges	(2,381)	(35)
Net cash provided by (used in) financing activities	21,126	(28,435)
Net decrease in cash and cash equivalents	(77,942)	(63,709)
Cash and cash equivalents at beginning of period	85,057	108,091
Cash and cash equivalents at end of period	$ 7,115	$ 44,382