Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2009
Cash flows provided by (used in) operating activities:
Net income	$ 24,344		$ 28,320		$ 131,038
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in fair value of derivative instruments	2,567		(5,622)		(13,690)
Depreciation and amortization	20,324		18,425		22,157
(Gain) loss on redemption of debt	1,700		1,132		(9,706)
Provision for losses on accounts receivable	10,388		5,279		10,310
Change in deferred taxes	15,831		13,331		(61,355)
Changes in operating assets and liabilities net of amounts related to acquisitions:
(Increase) decrease in receivables	(31,593)		(4,570)		26,657
Increase in inventories	(13,189)		(2,012)		(17,747)
Decrease in other assets	1,594		13,912		4,230
Increase (decrease) in accounts payable	1,943		(1,784)		216
Decrease in customer credit balances	(1,776)		(9,250)		(11,964)
Increase (decrease) in other current and long-term liabilities	7,269		(12,732)		(1,691)
Net cash provided by operating activities	39,402		44,429		78,455
Cash flows provided by (used in) investing activities:
Capital expenditures	(6,361)		(5,567)		(4,334)
Proceeds from sales of fixed assets	92		392		159
Acquisitions (net of cash acquired of $0, $3,390, and $0, respectively)	(9,659)		(68,658)		(3,393)
Earnout			(123)
Net cash used in investing activities	(15,928)		(73,956)		(7,568)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings	88,416		36,754
Revolving credit facility repayments	(88,416)		(36,754)
Repayment of debt	(82,499)		(50,854)		(30,230)
Proceeds from the issuance of debt	124,188
Debt extinguishment costs	(1,409)
Distributions	(20,677)	[1]	(20,353)	[1]	(15,411)	[1]
Unit repurchase	(10,949)		(33,234)		(2,336)
Increase in deferred charges	(6,401)		(130)		(6,558)
Net cash provided by (used in) financing activities	2,253		(104,571)		(54,535)
Net increase (decrease) in cash	25,727		(134,098)		16,352
Cash and equivalent at beginning of period	61,062		195,160		178,808
Cash and equivalent at end of period	$ 86,789		$ 61,062		$ 195,160

[1] See Note 4—Quarterly Distributions of Available Cash.