CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash flows provided by (used in) operating activities:
Net income	$ 12,058	$ 15,554
Adjustment to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in fair value of derivative instruments	5,536	8,290
Depreciation and amortization	7,078	6,558
Provision for losses on accounts receivable	(636)	236
Change in deferred taxes	609	230
Change in weather hedge contract receivable	(12,500)
Changes in operating assets and liabilities:
Increase in receivables	(22,263)	(58,241)
Increase in inventories	(9,064)	(8,633)
(Increase) decrease in other assets	1,091	(5,565)
Increase (decrease) in accounts payable	(3,020)	20,261
Increase (decrease) in customer credit balances	10,427	(5,862)
Increase in other current and long-term liabilities	13,883	13,752
Net cash provided by (used in) operating activities	3,199	(13,420)
Cash flows provided by (used in) investing activities:
Capital expenditures	(3,206)	(1,772)
Proceeds from sales of fixed assets	23	88
Acquisitions	(7,615)
Net cash used in investing activities	(10,798)	(1,684)
Cash flows provided by (used in) financing activities:
Distributions	(5,552)	(5,098)
Unit repurchases	(23)	(691)
Customer retainage payments	(235)
Payments of debt issue costs	(209)
Net cash used in financing activities	(6,019)	(5,789)
Net decrease in cash and cash equivalents	(13,618)	(20,893)
Cash and cash equivalents at beginning of period	100,508	48,999
Cash and cash equivalents at end of period	$ 86,890	$ 28,106