CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Cash flows provided by (used in) operating activities:
Net income		$ 26,900	$ 44,934	$ 37,556
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in fair value of derivative instruments	[1]	(2,193)	(18,217)	4,187
Depreciation and amortization		29,163	27,777	26,748
Multiemployer pension plan withdrawal charge				17,796
Loss on redemption of debt				7,345
Provision (recovery) for losses on accounts receivable		1,639	(639)	3,738
Change in deferred taxes		10,134	9,670	(4,101)
Changes in operating assets and liabilities net of amounts related to acquisitions:
(Increase) decrease in receivables		(19,844)	10,965	30,141
(Increase) decrease in inventories		(10,598)	9,979	4,326
(Increase) decrease in other assets		(140)	(2,354)	113
Increase (decrease) in accounts payable		2,169	(705)	3,189
(Decrease) increase in customer credit balances		(23,085)	6,490	3,992
Increase in other current and long-term liabilities		6,913	14,057	1,823
Net cash provided by operating activities		21,058	101,957	136,853
Cash flows provided by (used in) investing activities:
Capital expenditures		(12,164)	(10,134)	(9,555)
Proceeds from sales of fixed assets		734	318	300
Purchase of investments	[2]	(11,647)
Acquisitions		(43,304)	(9,815)	(21,130)
Net cash used in investing activities		(66,381)	(19,631)	(30,385)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings				12,296
Revolving credit facility repayments				(12,296)
Redemption of senior notes				(125,000)
Debt redemption cost				(5,548)
Proceeds from term loan				100,000
Loan repayments		(16,200)	(7,500)
Distributions		(24,322)	(23,092)	(21,298)
Unit repurchases			(12,017)	(691)
Customer retainage payments		(575)	(740)
Payments of debt issuance costs		(60)	(297)	(2,422)
Net cash used in financing activities		(41,157)	(43,646)	(54,959)
Net (decrease) increase in cash, cash equivalents and restricted cash		(86,480)	38,680	51,509
Cash, cash equivalents and restricted cash at beginning of period		139,188	100,508	48,999
Cash, cash equivalents and restricted cash at end of period		$ 52,708	$ 139,188	$ 100,508

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

[2] See Note 2 - Investments and Note 19 - Subsequent Events