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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 6 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 180,004,000 | $ 261,185,000
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 198,536,000 | 192,910,000
Asset impairment charges | 0 | 12,097,000
Provision for credit loss | 90,000 | 3,222,000
Stock-based compensation | 16,101,000 | 15,704,000
(Gain) loss on investment securities | 287,000 | (24,661,000)
Gain on reimbursement of drilling equipment | (14,955,000) | (27,298,000)
Other gain on sale of assets | (12,000) | (4,898,000)
Deferred income tax expense (benefit) | (15,933,000) | 3,165,000
Other | 1,630,000 | 1,780,000
Change in assets and liabilities |  |
Accounts receivable | (23,060,000) | (70,680,000)
Inventories of materials and supplies | (13,796,000) | (12,116,000)
Prepaid expenses and other | 2,862,000 | (16,387,000)
Other noncurrent assets | (9,369,000) | (1,060,000)
Accounts payable | 17,505,000 | 33,610,000
Accrued liabilities | (15,851,000) | (42,614,000)
Deferred income tax liability | 133,000 | (711,000)
Other noncurrent liabilities | (5,655,000) | 3,006,000
Net cash provided by operating activities | 318,517,000 | 326,254,000
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Capital expenditures | (254,711,000) | (181,479,000)
Purchase of short-term investments | (74,749,000) | (64,418,000)
Purchase of long-term investments | (8,013,000) | (18,771,000)
Proceeds from sale of short-term investments | 87,122,000 | 97,744,000
Insurance proceeds from involuntary conversion | 4,980,000 | 0
Proceeds from asset sales | 20,898,000 | 47,718,000
Net cash used in investing activities | (224,473,000) | (119,206,000)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Dividends paid | (84,371,000) | (102,941,000)
Payments for employee taxes on net settlement of equity awards | (12,176,000) | (14,410,000)
Share repurchases | (51,302,000) | (145,013,000)
Other | (250,000) | (790,000)
Net cash used in financing activities | (148,099,000) | (263,154,000)
Net decrease in cash and cash equivalents and restricted cash | (54,055,000) | (56,106,000)
Cash and cash equivalents and restricted cash, beginning of period | 316,238,000 | 269,009,000
Cash and cash equivalents and restricted cash, end of period | 262,183,000 | 212,903,000
Cash paid/(received) during the period: |  |
Interest paid | 8,047,000 | 8,919,000
Income tax paid | 81,294,000 | 118,090,000
Income tax received | 0 | (25,687,000)
Payments for operating leases | 6,714,000 | 5,970,000
Non-cash operating and investing activities: |  |
Change in accounts payable and accrued liabilities related to purchases of property, plant and equipment | $ (15,716,000) | $ 601,000

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