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Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net income | $ 1,239,502 | $ 1,377,159 | $ 1,034,375
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 324,449 | 276,066 | 259,899
Noncash lease expense | 18,665 | 16,658 | 14,890
Gain on disposal of property and equipment | (22,555) | (3,425) | (563)
Deferred income taxes | 53,341 | 62,008 | 30,165
Share-based compensation | 11,080 | 15,893 | 15,039
Changes in assets and liabilities: |  |  |
Customer and other receivables, net | (3,875) | (13,009) | (125,562)
Prepaid expenses and other assets | (38,189) | (24,714) | (38,387)
Accounts payable | 6,499 | 23,756 | 14,008
Compensation, benefits and other accrued liabilities | (1,422) | (11,202) | 32,437
Claims and insurance accruals | (2,249) | 5,464 | 10,963
Income taxes, net | (5,816) | 6,480 | (27,929)
Other liabilities | (10,295) | (39,552) | (6,729)
Net cash provided by operating activities | 1,569,135 | 1,691,582 | 1,212,606
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (757,309) | (775,148) | (550,077)
Proceeds from sale of property and equipment | 48,637 | 22,096 | 19,548
Purchase of short-term investments |  | (163,720) | (359,389)
Proceeds from maturities of short-term investments | 48,852 | 369,300 | 435,130
Other investing activities, net |  |  | (500)
Net cash used in investing activities | (659,820) | (547,472) | (455,288)
Cash flows from financing activities: |  |  |
Payments for share repurchases | (453,613) | (1,277,219) | (536,465)
Forward contract for accelerated share repurchases |  |  | (62,500)
Dividends paid | (175,089) | (134,484) | (92,366)
Principal payments under debt agreements | (20,000) |  |
Other financing activities, net | (13,126) | (8,659) | (4,853)
Net cash used in financing activities | (661,828) | (1,420,362) | (696,184)
Increase (decrease) in cash and cash equivalents | 247,487 | (276,252) | 61,134
Cash and cash equivalents at beginning of year | 186,312 | 462,564 | 401,430
Cash and cash equivalents at end of year | 433,799 | 186,312 | 462,564
Income taxes paid | 361,448 | 396,510 | 352,826
Interest paid | 3,484 | 3,953 | 4,232
Capitalized interest | $ 3,364 | $ 3,260 | 2,655
Supplemental disclosure of noncash investing and financing activities: |  |  |
Noncash purchases of property |  |  | $ 16,034

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