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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 | $ 497,415 | $ 459,799 | $ 237,624
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, accretion, and amortization | 716,309 | 707,576 | 700,161
Non-cash asset impairment and decommission costs | 154,947 | 42,807 | 31,790
Non-cash compensation expense | 87,919 | 99,909 | 84,402
(Gain) loss on remeasurement of U.S. denominated intercompany loans | (81,222) | (20,295) | 66,285
Loss from extinguishment of debt, net |  | 437 | 36,718
Deferred income tax expense (benefit) | 4,629 | 32,901 | (8,510)
Non-cash interest expense | 35,868 | 46,109 | 47,085
Amortization of deferred financing fees | 20,273 | 19,835 | 19,589
Other non-cash items reflected in the Statements of Operations | 43,785 | 9,742 | 9,881
Changes in operating assets and liabilities, net of acquisitions: |  |  |
Accounts receivable and costs and estimated earnings in excess of billings on uncompleted contracts, net | 44,386 | (81,351) | (38,237)
Prepaid expenses and other assets | (35,498) | (29,746) | (28,243)
Operating lease right-of-use assets, net | 141,114 | 135,473 | 114,321
Accounts payable and accrued expenses | (66,324) | 25,118 | (473)
Long-term lease liabilities | (138,699) | (129,471) | (113,292)
Other liabilities | 119,491 | (33,143) | 30,795
Net cash provided by operating activities | 1,544,393 | 1,285,700 | 1,189,896
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Acquisitions | (129,961) | (1,176,092) | (1,257,704)
Capital expenditures | (236,698) | (214,443) | (133,694)
Purchase of investments | (1,339,026) | (881,781) | (1,731,111)
Proceeds from sale of investments | 1,338,354 | 878,138 | 1,730,477
Loan to unconsolidated joint venture | (100,494) |  |
Other investing activities | (421) | 524 | (31,228)
Net cash used in investing activities | (468,246) | (1,393,654) | (1,423,260)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Borrowings under Revolving Credit Facility | 190,000 | 975,000 | 1,935,000
Repayments under Revolving Credit Facility | (730,000) | (605,000) | (1,965,000)
Proceeds from issuance of Senior Notes, net of fees |  |  | 1,485,373
Repayment of Senior Notes |  |  | (1,870,909)
Proceeds from issuance of Tower Securities, net of fees |  | 839,885 | 2,924,005
Repayment of Tower Securities |  | (640,000) | (1,335,000)
Repurchase and retirement of common stock | (100,010) | (431,666) | (582,578)
Payment of dividends on common stock | (369,960) | (306,766) | (253,580)
Proceeds from employee stock purchase/stock option plans | 44,196 | 38,303 | 86,688
Payments related to taxes on stock options and restricted stock units | (27,481) | (9,958) | (71,904)
Other financing activities | (23,963) | 4,728 | (12,831)
Net cash (used in) provided by financing activities | (1,017,218) | (135,474) | 339,264
Effect of exchange rate changes on cash, cash equivalents, and restricted cash | 2,734 | (2,915) | (13,082)
NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH | 61,663 | (246,343) | 92,818
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH: |  |  |
Beginning of period | 189,283 | 435,626 | 342,808
End of period | 250,946 | 189,283 | 435,626
Cash paid during the period for: |  |  |
Interest | 396,593 | 347,659 | 360,515
Income taxes | 25,581 | 32,320 | 25,568
SUPPLEMENTAL CASH FLOW INFORMATION OF NON-CASH ACTIVITIES: |  |  |
Right-of-use assets obtained in exchange for new operating lease liabilities | 55,409 | 171,203 | 33,315
Operating lease modifications and reassessments | (36,539) | 48,946 | 36,817
Right-of-use assets obtained in exchange for new finance lease liabilities | $ 1,954 | $ 3,860 | $ 2,100

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