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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Cash flows provided by (used in) operating activities: |  |  |
Net income |  | $ 84,960 | $ 57,979
Adjustment to reconcile net income to net cash provided by (used in) operating activities: |  |  |
(Increase) decrease in the fair value of derivative instruments | [1] | 209 | 3,891
Depreciation and amortization |  | 16,060 | 13,923
Provision for losses on accounts receivable |  | 3,465 | 1,525
Change in deferred taxes |  | 27,254 | 7,121
Changes in operating assets and liabilities: |  |  |
Increase in receivables |  | (170,530) | (111,631)
(Increase) decrease in inventories |  | (108) | 642
(Increase) decrease in other assets |  | (4,486) | 796
Increase in accounts payable |  | 8,118 | 6,797
Decrease in customer credit balances |  | (42,184) | (53,873)
Increase in other current and long-term liabilities |  | 16,967 | 36,954
Net cash used in operating activities |  | (60,275) | (35,876)
Cash flows provided by (used in) investing activities: |  |  |
Capital expenditures |  | (6,583) | (7,786)
Proceeds from sales of fixed assets |  | 132 | 132
Purchase of investments | [2] | (34,542) | (11,474)
Acquisitions |  | (224) | (7,651)
Net cash used in investing activities |  | (41,217) | (26,779)
Cash flows provided by (used in) financing activities: |  |  |
Revolving credit facility borrowings |  | 160,104 |
Revolving credit facility repayments |  | (45,102) |
Term loan repayments |  | (5,000) | (11,200)
Distributions |  | (12,604) | (11,719)
Unit repurchases |  | (12,023) |
Customer retainage payments |  | (912) | (409)
Payments of debt issue costs |  |  | (60)
Net cash provided by (used in) financing activities |  | 84,463 | (23,388)
Net decrease in cash, cash equivalents, and restricted cash |  | (17,029) | (86,043)
Cash, cash equivalents, and restricted cash at beginning of period |  | 52,708 | 139,188
Cash, cash equivalents, and restricted cash at end of period |  | $ 35,679 | $ 53,145
[1] | Represents the change in value of unrealized open positions and expired options.
[2] | See Note 2 – Captive insurance collateral

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