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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		6 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Cash flows provided by (used in) operating activities:
Net income		$ 86,163	$ 74,640
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	[1]	5,253	17,638
Depreciation and amortization		18,627	16,106
Provision for losses on accounts receivable		3,203	4,968
Change in deferred taxes		222	(9,335)
Change in weather hedge contract receivable/payable		(10,053)	2,110
Changes in operating assets and liabilities:
Increase in receivables		(69,562)	(159,249)
Decrease (increase) in inventories		12,008	(3,741)
Decrease in other assets		4,812	12,778
Decrease in accounts payable		(8,910)	(2,364)
Decrease in customer credit balances		(32,462)	(38,476)
Increase in other current and long-term liabilities		41,574	42,564
Net cash provided by (used in) operating activities		50,875	(42,361)
Cash flows provided by (used in) investing activities:
Capital expenditures		(5,684)	(6,814)
Proceeds from sales of fixed assets		201	746
Purchase of investments		(7,218)	(7,571)
Acquisitions		(496)	(13,671)
Net cash used in investing activities		(13,197)	(27,310)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings		90,202	139,331
Revolving credit facility repayments		(127,659)	(25,831)
Loan issuance		130,000
Term loan repayments		(92,500)	(2,500)
Distributions		(12,153)	(12,717)
Unit repurchases		(18,575)	(26,371)
Customer retainage payments		(300)	(357)
Payments of debt issue costs		(1,291)	(43)
Net cash (used in) provided by financing activities		(32,276)	71,512
Net increase in cash, cash equivalents, and restricted cash		5,402	1,841
Cash, cash equivalents, and restricted cash at beginning of period		5,149	14,781
Cash, cash equivalents, and restricted cash at end of period		$ 10,551	$ 16,622
[1] Represents the change in value of unrealized open positions and expired options.

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-Topic 230
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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