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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
CASH FLOWS USED IN OPERATING ACTIVITIES |  |
Net income | $ 177,866 | $ 159,821
Adjustments to reconcile net income to cash flows from operating activities |  |
Unrealized gain on derivative instruments | (45,539) | (707)
Realized and unrealized gains on investments in equity securities | 0 | (1,567)
Gain on sale of businesses | 0 | (645)
Depreciation and amortization | 58,542 | 44,143
Amortization of acquired wholesale energy contracts | 3,953 | 7,346
Allowance for equity used during construction | (8,053) | (3,602)
Allowance for doubtful accounts | 951 | 1,149
Non cash lease expense | 1,856 |
Deferred income taxes | 318 | 16,337
Manufactured gas plant remediation costs | (5,291) | (4,353)
Equity in earnings, net of distributions received from equity investees | (2,760) | (1,836)
Cost of removal - asset retirement obligations | (122) | (130)
Contributions to postemployment benefit plans | (5,742) | (1,909)
Tax benefit from stock-based compensation | 803 | 1,284
Changes in: |  |
Components of working capital | 3,526 | (71,746)
Other noncurrent assets | (1,258) | 13,483
Other noncurrent liabilities | 95 | 14,719
Cash flows from operating activities | 179,145 | 171,787
Expenditures for: |  |
Cost of removal | (17,487) | (17,134)
Acquisition of assets, net of cash acquired of $5.1 million | (523,647) | 0
Distribution from equity investees in excess of equity in earnings | 1,132 | 1,154
Investments in equity investees | (1,266) | (1,457)
Proceeds from sale of businesses, net of closing costs | 0 | 205,745
Proceeds from sale of investments in equity securities, net | 0 | 34,484
Cash flows (used in) from investing activities | (751,130) | 42,524
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES |  |
Proceeds from term loan | 350,000 | 0
Payments of term loan | (212,900) | 0
Payments of long-term debt | (9,764) | (12,005)
Proceeds from (payments of) short-term debt, net | 304,023 | (106,050)
Proceeds from sale-leaseback transaction | 4,000 |
Proceeds from sale-leaseback transaction |  | 9,895
Payments of common stock dividends | (56,821) | (51,750)
Proceeds from issuance of common stock - public equity offering | 212,900 | 0
Proceeds from waiver discount issuance of common stock | 0 | 24,539
Proceeds from issuance of common stock - DRP | 8,767 | 9,522
Tax withholding payments related to net settled stock compensation | (3,893) | (6,607)
Cash flows from (used in) financing activities | 596,312 | (132,456)
Change in cash, cash equivalents and restricted cash | 24,327 | 81,855
Cash, cash equivalents and restricted cash at beginning of period | 4,063 | 1,710
Cash, cash equivalents and restricted cash at end of period | 28,390 | 83,565
CHANGES IN COMPONENTS OF WORKING CAPITAL |  |
Receivables | (87,532) | (105,900)
Inventories | 90,484 | 125,810
Recovery of gas costs | (21,891) | (14,989)
Gas purchases payable | (10,922) | (21,544)
Prepaid expenses | (602) | (4,162)
Prepaid and accrued taxes | 22,258 | (4,555)
Accounts payable and other | (27,345) | (35,953)
Restricted broker margin accounts | 39,193 | (2,217)
Customers' credit balances and deposits | (7,788) | (9,163)
Other current assets | 7,671 | 927
Components of working capital | 3,526 | (71,746)
Cash paid for: |  |
Interest (net of amounts capitalized) | 32,872 | 27,454
Income taxes | 1,193 | 1,003
Accrued capital expenditures | 17,930 | 29,685
Utility Plant |  |
Expenditures for: |  |
Payments to acquire PP&E | (132,352) | (121,962)
Solar Equipment |  |
Expenditures for: |  |
Payments to acquire PP&E | (69,786) | (52,520)
Midstream and Other Property |  |
Expenditures for: |  |
Payments to acquire PP&E | $ (7,724) | $ (5,786)

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