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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 | $ 25,399 | $ 53,079 | $ 41,100
net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 170,705 | 126,351 | 103,590
Interest accretion on landfill and environmental remediation liabilities | 9,885 | 8,008 | 7,324
Amortization of debt issuance costs | 2,962 | 1,903 | 2,288
Stock-based compensation | 9,084 | 8,155 | 11,551
Operating lease right-of-use assets expense | 15,318 | 13,804 | 13,827
Disposition of assets, other items and charges, net | 708 | 737 | 1,055
Loss from termination of bridge financing | 8,191 | 0 | 0
Landfill capping charge - veneer failure | 3,021 | 0 | 0
Deferred income taxes | 7,392 | 16,527 | 15,073
Changes in assets and liabilities, net of effects of acquisitions and divestitures: |  |  |
Accounts receivable | (39,436) | (7,101) | (7,422)
Landfill operating lease contract expenditures | (5,496) | (5,486) | (5,655)
Accounts payable | 41,592 | 11,075 | 13,888
Prepaid expenses, inventories and other assets | (8,172) | (11,054) | (6,343)
Accrued expenses, contract liabilities and other liabilities | (8,061) | 1,316 | (7,539)
Net cash provided by operating activities | 233,092 | 217,314 | 182,737
Cash Flows from Investing Activities: |  |  |
Acquisitions, net of cash acquired | (851,839) | (78,197) | (170,647)
Additions to property and equipment | (154,907) | (130,960) | (123,295)
Proceeds from sale of cost method investment | 0 | 1,637 | 0
Proceeds from sale of property and equipment | 1,110 | 600 | 788
Net cash used in investing activities | (1,005,636) | (206,920) | (293,154)
Cash Flows from Financing Activities: |  |  |
Proceeds from debt borrowings | 465,000 | 88,200 | 3,701
Principal payments on debt | (26,257) | (59,211) | (10,305)
Payments of debt issuance costs | (12,759) | (1,232) | (3,684)
Payments of contingent consideration | 0 | (1,000) | 0
Proceeds from the exercise of share based awards | 89 | 192 | 172
Proceeds from the public offering of Class A Common Stock | 496,231 | 0 | 0
Net cash provided by (used in) financing activities | 922,304 | 26,949 | (10,116)
Net increase (decrease) in cash and cash equivalents | 149,760 | 37,343 | (120,533)
Cash and cash equivalents, beginning of period | 71,152 | 33,809 | 154,342
Cash and cash equivalents, end of period | 220,912 | 71,152 | 33,809
Supplemental Disclosures of Cash Flow Information: |  |  |
Interest | 43,588 | 21,003 | 19,025
Income tax payments, net | 10,109 | 2,798 | 1,438
Supplemental Disclosures of Non-Cash Investing and Financing Activities: |  |  |
Non-current assets acquired through long-term financing obligations | $ 12,322 | $ 11,919 | $ 20,753

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