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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows provided by (used in) operating activities: |  |  |
Net income |  | $ 123,024 | $ 86,163
Adjustment to reconcile net income to net cash provided by (used in) operating activities: |  |  |
(Increase) decrease in the fair value of derivative instruments | [1] | (25,619) | 5,253
Depreciation and amortization |  | 16,715 | 18,627
Provision for losses on accounts receivable |  | 256 | 3,203
Change in deferred taxes |  | 12,623 | 222
Change in weather hedge contracts |  | (3,424) | (10,053)
Changes in operating assets and liabilities: |  |  |
Increase in receivables |  | (103,987) | (69,562)
(Increase) decrease in inventories |  | (9,652) | 12,008
(Increase) decrease in other assets |  | (2,016) | 4,812
Increase (decrease) in accounts payable |  | 5,538 | (8,910)
Decrease in customer credit balances |  | (43,421) | (32,462)
Increase in other current and long-term liabilities |  | 35,436 | 41,574
Net cash provided by operating activities |  | 5,473 | 50,875
Cash flows provided by (used in) investing activities: |  |  |
Capital expenditures |  | (7,232) | (5,684)
Proceeds from sales of fixed assets |  | 143 | 201
Proceeds from sale of propane assets |  | 6,093 |
Purchase of investments |  | (603) | (7,218)
Acquisitions |  | (38,363) | (496)
Net cash used in investing activities |  | (39,962) | (13,197)
Cash flows provided by (used in) financing activities: |  |  |
Revolving credit facility borrowings |  | 75,154 | 90,202
Revolving credit facility repayments |  | (40,154) | (127,659)
Loan issuance |  |  | 130,000
Term loan repayments |  | (6,500) | (92,500)
Distributions |  | (11,533) | (12,153)
Unit repurchases |  | (30,466) | (18,575)
Customer retainage payments |  | (29) | (300)
Payments of debt issue costs |  | (11) | (1,291)
Net cash used in financing activities |  | (13,539) | (32,276)
Net (decrease) increase in cash, cash equivalents, and restricted cash |  | (48,028) | 5,402
Cash, cash equivalents, and restricted cash at beginning of period |  | 57,161 | 5,149
Cash, cash equivalents, and restricted cash at end of period |  | $ 9,133 | $ 10,551
[1] | Represents the change in value of unrealized open positions and expired options.

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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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