CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Cash flows provided by (used in) operating activities:
Net income		$ 27,755	$ 2,315
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	[1]	(6,417)	31,039
Depreciation and amortization		9,285	8,004
Provision for losses on accounts receivable		1,010	1,529
Change in deferred taxes		1,336	(616)
Changes in operating assets and liabilities:
Increase in receivables		(85,745)	(95,743)
Increase in inventories		(15,427)	(20,187)
Increase in other assets		(2,394)	(3,235)
Increase in accounts payable		14,375	8,206
Decrease in customer credit balances		(15,898)	(14,120)
Increase in other current and long-term liabilities		20,529	19,917
Net cash used in operating activities		(51,591)	(62,891)
Cash flows provided by (used in) investing activities:
Capital expenditures		(3,024)	(4,025)
Proceeds from sales of fixed assets		63	644
Purchase of investments		(4,206)	(4,456)
Acquisitions		(496)	(275)
Net cash used in investing activities		(7,663)	(8,112)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings		90,202	92,500
Revolving credit facility repayments		(39,014)
Loan issuance		130,000
Term loan repayments		(92,500)
Distributions		(6,155)	(6,413)
Unit repurchases		(12,064)	(5,735)
Customer retainage payments		(299)	(57)
Payments of debt issue costs		(1,273)	(34)
Net cash provided by financing activities		68,897	80,261
Net increase in cash, cash equivalents, and restricted cash		9,643	9,258
Cash, cash equivalents, and restricted cash at beginning of period		5,149	14,781
Cash, cash equivalents, and restricted cash at end of period		$ 14,792	$ 24,039

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