CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Cash flows provided by (used in) operating activities:
Net income		$ 55,505	$ 26,900	$ 44,934
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
(Increase) decrease in the fair value of derivative instruments	[1]	(11,408)	(2,193)	(18,217)
Depreciation and amortization		32,863	29,163	27,777
Provision (recovery) for losses on accounts receivable		6,283	1,639	(639)
Change in deferred taxes		14,685	10,134	9,670
Gain on sale of security business	[2]	(7,043)
Changes in operating assets and liabilities net of amounts related to acquisitions:
(Increase) decrease in receivables		(37,149)	(19,844)	10,965
Decrease (increase) in inventories		4,177	(10,598)	9,979
Increase in other assets		(11,924)	(140)	(2,354)
Increase (decrease) in accounts payable		9,703	2,169	(705)
(Decrease) increase in customer credit balances		(6,563)	(23,085)	6,490
Increase in other current and long-term liabilities		8,331	6,913	14,057
Net cash provided by operating activities		57,460	21,058	101,957
Cash flows provided by (used in) investing activities:
Capital expenditures		(13,590)	(12,164)	(10,134)
Proceeds from sales of fixed assets		503	734	318
Proceeds from sale of security business	[2]	6,824
Purchase of investments	[3]	(35,242)	(11,647)
Acquisitions		(23,747)	(43,304)	(9,815)
Net cash used in investing activities		(65,252)	(66,381)	(19,631)
Cash flows provided by (used in) financing activities:
Revolving credit facility borrowings		161,604
Revolving credit facility repayments		(160,104)
Proceeds from term loan		100,000
Loan repayments		(76,300)	(16,200)	(7,500)
Distributions		(25,603)	(24,322)	(23,092)
Unit repurchases		(26,714)		(12,017)
Customer retainage payments		(918)	(575)	(740)
Payments of debt issuance costs		(2,100)	(60)	(297)
Net cash used in financing activities		(30,135)	(41,157)	(43,646)
Net (decrease) increase in cash, cash equivalents and restricted cash		(37,927)	(86,480)	38,680
Cash, cash equivalents and restricted cash at beginning of period		52,708	139,188	100,508
Cash, cash equivalents and restricted cash at end of period		$ 14,781	$ 52,708	$ 139,188

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

[2] See Note 2 - Other income, net.

[3] See Note 2 - Investments.