CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Cash flows provided by (used in) operating activities:
Net income		$ 37,860	$ 27,755
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	[1]	(17,395)	(6,417)
Depreciation and amortization		8,204	9,285
(Recovery) provision for losses on accounts receivable		(476)	1,010
Change in deferred taxes		3,601	1,336
Change in weather hedge contracts		(3,955)	3,045
Changes in operating assets and liabilities:
Increase in receivables		(62,989)	(85,745)
Increase in inventories		(7,177)	(15,427)
Increase in other assets		(5,651)	(2,394)
Increase in accounts payable		12,325	14,375
Decrease in customer credit balances		(8,987)	(15,898)
Increase in other current and long-term liabilities		17,639	17,484
Net cash used in operating activities		(27,001)	(51,591)
Cash flows provided by (used in) investing activities:
Capital expenditures		(4,680)	(3,024)
Proceeds from sales of fixed assets		60	63
Proceeds from sale of propane assets		6,093
Purchase of investments		(303)	(4,206)
Acquisitions		(37,073)	(496)
Net cash used in investing activities		(35,903)	(7,663)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings		59,341	90,202
Revolving credit facility repayments			(39,014)
Loan issuance			130,000
Term loan repayments		(3,250)	(92,500)
Distributions		(5,939)	(6,155)
Unit repurchases		(25,272)	(12,064)
Customer retainage payments		(29)	(299)
Payments of debt issue costs		(11)	(1,273)
Net cash provided by financing activities		24,840	68,897
Net (decrease) increase in cash, cash equivalents, and restricted cash		(38,064)	9,643
Cash, cash equivalents, and restricted cash at beginning of period		57,161	5,149
Cash, cash equivalents, and restricted cash at end of period		$ 19,097	$ 14,792

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