CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Cash flows provided by (used in) operating activities:
Net income		$ 18,275	$ 12,058
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in fair value of derivative instruments		(8,551)	5,536
Depreciation and amortization		6,873	7,078
Provision (recovery) for losses on accounts receivable		31	(636)
Change in deferred taxes		3,941	609
Change in weather hedge contract receivable			(12,500)
Changes in operating assets and liabilities:
Increase in receivables		(76,845)	(22,263)
Increase in inventories		(16,248)	(9,064)
(Increase) decrease in other assets		(3,294)	1,091
Increase (decrease) in accounts payable		21,725	(3,020)
Increase (decrease) in customer credit balances		(22,805)	10,427
Increase in other current and long-term liabilities		11,392	13,883
Net cash provided by (used in) operating activities		(65,506)	3,199
Cash flows provided by (used in) investing activities:
Capital expenditures		(4,521)	(3,206)
Proceeds from sales of fixed assets		34	23
Purchase of investments	[1]	(11,474)
Acquisitions		(5,835)	(7,615)
Net cash used in investing activities		(21,796)	(10,798)
Cash flows used in financing activities:
Term loan repayment		(8,700)
Distributions		(5,860)	(5,552)
Unit repurchases			(23)
Customer retainage payments			(235)
Payments of debt issue costs			(209)
Net cash used in financing activities		(14,560)	(6,019)
Net decrease in cash, cash equivalents, and restricted cash		(101,862)	(13,618)
Cash, cash equivalents, and restricted cash at beginning of period		139,188	100,508
Cash, cash equivalents, and restricted cash at end of period		$ 37,326	$ 86,890

[1] See Note 2 - Investments