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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Cash flows from operating activities: |  |
Net income | $ 30,605 | $ 18,959
Adjustment for (income) loss from discontinued operations | 124 | (10,595)
Income from continuing operations | 30,729 | 8,364
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 130,131 | 141,460
Amortization of debt discount and debt issuance costs | 444 | 329
Provision for bad debt | (2,069) | 873
Stock-based compensation | 10,201 | 7,158
(Gain) loss on investment securities | (2,821) | 42,844
Gain on sale of assets | (4,279) | (5,545)
Gain on sale of subsidiary | (14,963) | 0
Deferred income tax (benefit) expense | (7,966) | 1,107
Other | (139) | 168
Change in assets and liabilities increasing (decreasing) cash: |  |
Accounts receivable | (3,269) | 19,700
Inventories of materials and supplies | 965 | (1,858)
Prepaid expenses and other | (19,699) | 64
Other noncurrent assets | 6,367 | (273)
Accounts payable | (1,580) | 8,012
Accrued liabilities | (8,093) | (2,919)
Deferred income tax liability | 6 | (306)
Other noncurrent liabilities | (2,184) | (9,670)
Net cash provided by operating activities from continuing operations | 111,781 | 209,508
Net cash used in operating activities from discontinued operations | 0 | (26)
Net cash provided by operating activities | 111,781 | 209,482
Cash flows from investing activities: |  |
Capital expenditures | (46,021) | (196,094)
Purchase of short-term investments | (28,948) | (31,324)
Payment for acquisition of business, net of cash acquired | 0 | (2,781)
Proceeds from sale of short-term investments | 25,000 | 31,860
Proceeds from sale of subsidiary | 15,056 | 0
Proceeds from asset sales | 11,878 | 11,609
Net cash used in investing activities | (23,035) | (186,730)
Cash flows from financing activities: |  |
Dividends paid | (77,602) | (78,122)
Debt issuance costs paid | 0 | (3,912)
Proceeds from stock option exercises | 4,100 | 1,954
Payments for employee taxes on net settlement of equity awards | (3,455) | (6,267)
Other | (445) | 0
Net cash used in financing activities | (77,402) | (86,347)
Net increase (decrease) in cash and cash equivalents and restricted cash | 11,344 | (63,595)
Cash and cash equivalents and restricted cash, beginning of period | 382,971 | 326,185
Cash and cash equivalents and restricted cash, end of period | 394,315 | 262,590
Cash paid during the period: |  |
Interest paid | 46 | 6,140
Income tax paid, net | 934 | 5,710
Cash paid for amounts included in the measurement of lease liabilities: |  |
Operating cash flows for operating leases | 4,877 |
Changes in accounts payable and accrued liabilities related to purchases of property, plant and equipment | $ (1,339) | $ 8,708

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- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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