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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 | $ 167,528 | $ 356,948 | $ 171,474
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization of intangibles and right-of-use assets | 184,449 | 153,726 | 130,629
Impairment of right-of-use asset | 2,012 | 5,874 | 0
Deferred taxes | 9,587 | 4,448 | (3,992)
Compensation expense related to share-based compensation plans | 21,348 | 20,426 | 20,056
Gain on sale of assets | (6,835) | (24,176) | (19,173)
Changes in operating assets and liabilities, net of acquisitions: |  |  |
Restricted investments | (2,698) | 6,191 | (903)
Accounts receivable, net | 145,088 | 8,298 | (115,568)
Prepaid taxes | (344) | (14,796) | (856)
Prepaid expenses and other current assets | (5,974) | (3,111) | (647)
Other assets | (3,732) | (4,231) | (2,883)
Accounts payable | 1,215 | (89,103) | 78,448
Accrued expenses | (63,626) | 57,613 | 9,686
Non-current liabilities | (25,860) | (19,944) | (13,436)
Net cash provided by operating activities | 422,158 | 458,163 | 252,835
Cash flows from investing activities: |  |  |
Proceeds from sale of equipment | 27,717 | 42,929 | 45,177
Purchases of property and equipment | (140,068) | (219,140) | (132,952)
Acquisitions, net of cash acquired | (260,810) | (102,661) | (122,360)
Net cash used in investing activities | (373,161) | (278,872) | (210,135)
Cash flows from financing activities: |  |  |
Purchase of treasury stock | (143,770) | (75,000) | 0
Repayments of long-term debt | (105,771) | (111,482) | (107,608)
Stock tendered for payments of withholding taxes | (10,148) | (8,312) | (9,123)
Finance lease payments | (2,708) | (2,093) | (2,682)
Purchase of treasury stock from related party (Note 17) | 0 | (34,767) | 0
Proceeds from issuance of debt | 113,988 | 179,195 | 112,001
Net cash used in financing activities | (148,409) | (52,459) | (7,412)
Effect of exchange rate changes on cash and cash equivalents | 40 | 26 | (10)
Net increase (decrease) in cash and cash equivalents | (99,372) | 126,858 | 35,278
Cash and cash equivalents beginning of the year | 286,642 | 159,784 | 124,506
Cash and cash equivalents end of the year | 187,270 | 286,642 | 159,784
Supplemental disclosures of cash paid for: |  |  |
Interest | 12,510 | 7,991 | 7,602
Income taxes | $ 34,882 | $ 128,812 | $ 58,593

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