CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Cash flows provided by (used in) operating activities:
Net income		$ 13,539	$ 14,489
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	[1]	17,636	13,403
Depreciation and amortization		8,166	8,687
Provision (recovery) for losses on accounts receivable		1,046	(288)
Change in deferred taxes		(1,224)	(684)
Change in weather hedge contracts		350	(2,188)
Changes in operating assets and liabilities:
Increase in receivables		(115,164)	(78,794)
Increase in inventories		(28,717)	(16,388)
Increase in other assets		(2,005)	(16,767)
Increase in accounts payable		22,366	15,442
Decrease in customer credit balances		(14,700)	(14,504)
Increase in other current and long-term liabilities		5,966	11,727
Net cash used in operating activities		(92,741)	(65,865)
Cash flows provided by (used in) investing activities:
Capital expenditures		(3,095)	(3,787)
Proceeds from sales of fixed assets		215	254
Proceeds from sale of certain assets		2,202
Purchase of investments		(215)	(175)
Acquisitions		(1,193)	(3,326)
Net cash used in investing activities		(2,086)	(7,034)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings		116,298	115,064
Term loan repayments		(4,125)	(7,871)
Distributions		(5,774)	(5,790)
Unit repurchases		(3,596)	(11,765)
Customer retainage payments		(5)	(267)
Net cash provided by financing activities		102,798	89,371
Net increase in cash, cash equivalents, and restricted cash		7,971	16,472
Cash, cash equivalents, and restricted cash at beginning of period		14,870	5,017
Cash, cash equivalents, and restricted cash at end of period		$ 22,841	$ 21,489

[1] Represents the change in value of unrealized open positions and expired options.