CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		6 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Cash flows provided by (used in) operating activities:
Net income		$ 95,868	$ 123,024
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	[1]	(4,212)	(25,619)
Depreciation and amortization		17,005	16,715
Provision for losses on accounts receivable		2,167	256
Change in deferred taxes		4,545	12,623
Change in weather hedge contracts		(1,087)	(3,424)
Changes in operating assets and liabilities:
Increase in receivables		(165,063)	(103,987)
Increase in inventories		(18,048)	(9,652)
Increase in other assets		(41,314)	(2,016)
Increase in accounts payable		16,434	5,538
Decrease in customer credit balances		(50,913)	(43,421)
Increase in other current and long-term liabilities		39,177	35,436
Net cash (used in) provided by operating activities		(105,441)	5,473
Cash flows provided by (used in) investing activities:
Capital expenditures		(7,128)	(7,232)
Proceeds from sales of fixed assets		530	143
Proceeds from sale of propane assets			6,093
Purchase of investments		(369)	(603)
Acquisitions		(6,536)	(38,363)
Net cash used in investing activities		(13,503)	(39,962)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings		200,177	75,154
Revolving credit facility repayments		(23,072)	(40,154)
Term loan repayments		(11,365)	(6,500)
Distributions		(11,432)	(11,533)
Unit repurchases		(22,182)	(30,466)
Customer retainage payments		(267)	(29)
Payments of debt issue costs			(11)
Net cash provided by (used in) financing activities		131,859	(13,539)
Net (decrease) increase in cash, cash equivalents, and restricted cash		12,915	(48,028)
Cash, cash equivalents, and restricted cash at beginning of period		5,017	57,161
Cash, cash equivalents, and restricted cash at end of period		$ 17,932	$ 9,133

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