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CONSOLIDATED 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 | $ 112,290 | $ 245,580 | $ 261,478
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 299,509 | 279,923 | 267,700
Deferred income taxes | 8,153 | 42,553 | 29,488
Gain on disposal of property and equipment | (42,440) | (88,564) | (60,528)
Non-cash equity compensation | 11,943 | 12,486 | 10,807
Insurance and claims accruals, net of current portion | (5,246) | 7,726 | 5,582
Loss (gain) on investments in equity securities, net | 278 | (12,195) | (40,317)
Loss from equity method investment | 1,046 | 0 | 0
Other | (7,612) | (13,295) | (3,105)
Changes in certain working capital items: |  |  |
Accounts receivable, net | 73,921 | 3,174 | (101,007)
Other current assets | 10,266 | (18,333) | (27,903)
Accounts payable | 3,288 | (3,665) | 14,742
Other current liabilities | 8,970 | (6,679) | (24,118)
Net cash provided by operating activities | 474,366 | 448,711 | 332,819
Cash flows from investing activities: |  |  |
Additions to property and equipment | (598,785) | (507,252) | (370,850)
Proceeds from sales of property and equipment | 190,087 | 189,673 | 177,801
Net cash invested in acquisitions | (188) | (184,118) | (201,845)
Investment in equity securities, net | (2,931) | (20,250) | (10,000)
Payments to acquire equity method investment | (3,385) | 0 | 0
Purchase of promissory note | (25,000) | 0 | 0
Decrease in notes receivable | 5,258 | 7,614 | 7,593
Net cash used in investing activities | (434,944) | (514,333) | (397,301)
Cash flows from financing activities: |  |  |
Repayments of short-term debt | (50,000) | (3,750) | (27,500)
Proceeds from issuance of short-term debt | 45,000 | 0 | 5,000
Repayments of long-term debt | (90,000) | (100,000) | 0
Proceeds from issuance of long-term debt | 50,000 | 370,000 | 250,000
Dividends on common stock | (34,208) | (32,162) | (29,083)
Repurchases of common stock | 0 | (110,400) | (104,444)
Tax withholding related to net share settlements of restricted stock awards | (6,359) | (4,082) | (4,270)
Distribution to noncontrolling interest | 0 | (1,572) | (35)
Other | (1,500) | 0 | 0
Net cash provided by (used in) financing activities | (87,067) | 118,034 | 89,668
Effect of exchange rate fluctuations on cash | 2,128 | 632 | (324)
Net increase (decrease) in cash and cash equivalents | (45,517) | 53,044 | 24,862
Cash and cash equivalents, beginning of period | 107,240 | 54,196 | 29,334
Cash and cash equivalents, end of period | 61,723 | 107,240 | 54,196
Supplemental disclosures of cash flow information: |  |  |
Interest paid | 27,212 | 11,186 | 4,228
Income taxes paid | 17,892 | 40,313 | 81,185
Supplemental schedule of non-cash investing and financing activities: |  |  |
Notes receivable issued upon sale of property and equipment | 3,145 | 5,577 | 5,953
Change in fair value of interest rate swaps | (4,512) | 6,886 | 3,610
Property and equipment acquired included in accounts payable | 14,239 | 5,937 | 7,124
Property and equipment disposed included in other receivables | 0 | 110 | 0
Dividends accrued but not yet paid at end of period | 8,882 | 8,220 | 7,895
Noncontrolling interest associated with acquisition | 0 | 0 | 33,556
Contingent consideration associated with acquisition | $ (800) | $ 13,400 | $ 2,500

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