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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES |  |  |
Net income | $ 114,809 | $ 92,879 | $ 101,299
Adjustments to reconcile net income to cash flows from operating activities: |  |  |
Unrealized (gain) loss on derivative instruments | (9,417) | 35,789 | 36,876
Depreciation and amortization | 47,310 | 41,643 | 35,200
Allowance for equity used during construction | (2,037) | (638) | (2,100)
Allowance for bad debt expense | 2,627 | 3,932 | 4,865
Deferred income taxes | 41,075 | (5,323) | 35,034
Manufactured gas plant remediation costs | (6,166) | (7,965) | (14,115)
Equity in earnings of affiliates, net of distributions received | 3,299 | 6,799 | 2,791
Cost of removal - asset retirement obligations | (1,697) | (1,196) | (826)
Contributions to postemployment benefit plans | (26,028) | (25,874) | (11,496)
Changes in: |  |  |
Components of working capital | (60,316) | (95,357) | 43,748
Other noncurrent assets | 9,496 | (20,539) | 7,081
Other noncurrent liabilities | 1,039 | 26,931 | 11,744
Cash flows from operating activities | 113,994 | 51,081 | 250,101
CASH FLOWS (USED IN) INVESTING ACTIVITIES |  |  |
Utility plant | (110,482) | (104,277) | (93,624)
Solar equipment | (59,125) | (89,726) | (71,989)
Real estate properties and other | (1,042) | (1,334) | (3,549)
Cost of removal | (26,601) | (12,178) | (8,369)
Investments in equity investees | 0 | (8,800) | 0
Proceeds from Equity Method Investment, Dividends or Distributions, Return of Capital | 3,079 | 0 | 0
Withdrawal from restricted cash construction fund | 56 | (802) | 58
Proceeds from asset sales | 0 | 0 | 2,396
Proceeds from sale of available-for-sale securities | 482 | 0 | 0
Cash flows (used in) investing activities | (193,633) | (217,117) | (175,077)
CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES |  |  |
Proceeds from issuance of common stock | 37,839 | 13,834 | 13,704
Tax benefit from stock options exercised | 173 | 780 | 2,007
Proceeds from sale-leaseback transaction | 7,076 | 6,522 | 5,901
Proceeds from long-term debt | 50,000 | 100,000 | 97,045
Payments of long-term debt | (8,953) | (8,025) | (130,091)
Purchases of treasury stock | (26,606) | (8,768) | (10,193)
Payments of common stock dividends | (67,230) | (61,688) | (58,650)
Net proceeds of short-term debt | 85,800 | 120,450 | 11,750
Cash flows from (used in) financing activities | 78,099 | 163,105 | (68,527)
Change in cash and cash equivalents | (1,540) | (2,931) | 6,497
Cash and cash equivalents at beginning of period | 4,509 | 7,440 | 943
Cash and cash equivalents at end of period | 2,969 | 4,509 | 7,440
CHANGES IN COMPONENTS OF WORKING CAPITAL |  |  |
Receivables | (72,244) | 36,670 | (49,473)
Inventories | (55,755) | 28,814 | 40,363
Recovery of gas costs | 6,100 | (11,686) | 41,118
Gas purchases payable | 72,399 | (70,277) | 22,289
Prepaid and accrued taxes | (8,182) | 23,036 | (8,691)
Accounts payable and other | 726 | (3,418) | 4,469
Restricted broker margin accounts | 15,348 | 666 | (31,813)
Customers' credit balances and deposits | (24,059) | (65,324) | 21,819
Other current assets | 5,351 | (33,838) | 3,667
Components of working capital | (60,316) | (95,357) | 43,748
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION |  |  |
Cash paid for Interest (net of amounts capitalized) | 20,414 | 16,670 | 17,323
Cash paid for Income taxes | 12,039 | 10,053 | 5,165
SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING ACTIVITIES |  |  |
Accrued capital expenditures | $ (7,103) | $ 8,257 | $ 9,423

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- Definition Cash outflows made during the period for environmental remediation activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3367-108585 + Details
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