Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income including noncontrolling interest	$ 105,870	$ 93,615
Adjustments to reconcile net income including noncontrolling interest to net cash provided by operating activities:
Depreciation and amortization	47,424	44,611
Provision for uncollectible accounts	4,878	3,308
Changes in unrealized losses (gains) on derivative instruments	(751)	(25,730)
Loss on extinguishments of debt	0	33,151
Other, net	2,026	5,274
Net change in:
Accounts receivable	(141,299)	(132,293)
Inventories	(19,170)	(20,068)
Accounts payable	64,101	64,201
Other current assets	(11,553)	(4,291)
Other current liabilities	(49,705)	(28,735)
Net cash provided by operating activities	1,821	33,043
CASH FLOWS FROM INVESTING ACTIVITIES
Expenditures for property, plant and equipment	(23,586)	(26,380)
Proceeds from disposals of assets	3,661	2,826
Acquisitions of businesses, net of cash acquired	0	(835)
Net cash used by investing activities	(19,925)	(24,389)
CASH FLOWS FROM FINANCING ACTIVITIES
Distributions	(100,650)	(99,091)
Noncontrolling interest activity	(1,571)	192
Increase (decrease) in short-term borrowings	123,500	(75,700)
Issuances of long-term debt, net of issuance costs	0	690,000
Repayments of long-term debt, including redemption premiums	(1,255)	(530,629)
Other	(2,039)	0
Net cash provided (used) by financing activities	17,985	(15,228)
Cash and cash equivalents decrease	(119)	(6,574)
CASH AND CASH EQUIVALENTS
End of period	7,197	9,253
Beginning of period	7,316	15,827
Decrease	$ (119)	$ (6,574)