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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Cash flows from operating activities: |  |  |
Net income | $ 27,464,000 | $ 47,580,000 | $ 33,255,000
Adjustments to reconcile net income to net cash flows provided by operating activities: |  |  |
Depreciation and amortization | 82,296,000 | 77,994,000 | 65,031,000
Stock compensation expense | 4,414,000 | 5,508,000 | 12,929,000
Deferred income taxes | 9,234,000 | 15,503,000 | (17,874,000)
Long-term deferred revenue | 14,369,000 |  |
Amortization of deferred credits | (3,742,000) | (5,121,000) | (4,395,000)
Unfavorable lease liabilities |  | (5,718,000) | (6,640,000)
Amortization of debt financing costs and accretion of interest on non-interest-bearing subordinated notes | 4,202,000 | 4,203,000 | 4,606,000
Loss on extinguishment of debt |  | 3,616,000 |
Loss/(Gain) on disposal of assets | 401,000 | (5,000) | 307,000
Provision for obsolete expendable parts and supplies |  | 642,000 | 200,000
Loss on lease termination |  | 9,540,000 | 15,109,000
Changes in assets and liabilities: |  |  |
Receivables | 9,368,000 | (9,275,000) | (5,437,000)
Expendable parts and supplies | (1,529,000) | (6,310,000) | (744,000)
Prepaid expenses and other current assets | (1,368,000) | (713,000) | 7,584,000
Accounts payable | 3,418,000 | 12,119,000 | 2,427,000
Accrued liabilities | 30,190,000 | 2,113,000 | 12,581,000
Change in operating activity of ROU asset | (4,055,000) |  |
Net cash provided by operating activities | 174,662,000 | 151,676,000 | 118,939,000
Cash flows from investing activities: |  |  |
Capital expenditures | (26,667,000) | (125,350,000) | (117,989,000)
Purchases of investment securities |  | (14,884,000) | (19,921,000)
Sales of investment securities |  | 34,961,000 |
Net returns (payments) on equipment & other deposits |  | 431,000 | (653,000)
Net cash used in investing activities | (26,667,000) | (104,842,000) | (138,563,000)
Cash flows from financing activities: |  |  |
Proceeds from long-term debt | 23,000,000 | 171,658,000 | 187,703,000
Principal payments on long-term debt and finance leases | (138,289,000) | (244,087,000) | (222,153,000)
Debt financing costs | (1,780,000) | (5,680,000) | (5,852,000)
Debt prepayment costs |  | (1,672,000) |
Proceeds from issuance of common stock |  |  | 124,246,000
Stock issuance costs |  | 185,000 | (12,540,000)
Repurchase of stock | (586,000) | (1,871,000) | (4,993,000)
Net cash (used in) provided by financing activities | (117,655,000) | (81,467,000) | 66,411,000
Net change in cash and cash equivalents | 30,340,000 | (34,633,000) | 46,787,000
Cash and cash equivalents and restricted cash at beginning of period | 72,501,000 | 107,134,000 | 60,347,000
Cash and cash equivalents and restricted cash at end of period | 102,841,000 | 72,501,000 | 107,134,000
Supplemental cash flow information |  |  |
Cash paid for interest | 41,501,000 | 53,503,000 | 50,672,000
Cash paid for income taxes - net | 398,000 | 419,000 | 385,000
Operating lease payments in operating cash flows | 44,173,000 |  |
Supplemental non-cash operating activities |  |  |
Right-of-use assets obtained in exchange of lease liabilities | 145,054,000 |  |
Supplemental non-cash investing and financing activities |  |  |
Accrued capital expenditures | $ 61,000 | $ 179,000 | 16,677,000
Acquisition of finance leases |  |  | $ 10,473,000

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- Definition Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest. + 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 (g) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The cash outflow for loan and debt issuance costs. + 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 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow for purchase of marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26853-111562 + Details
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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + 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 (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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