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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |  |
Net income | $ 712,949 | $ 865,349 | $ 634,983
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and other amortization | 35,230 | 54,252 | 66,014
Deferred tax expense (benefit) | 1,065 | (4,367) | 5,188
Equity compensation | 31,607 | 24,771 | 17,109
Loss on debt extinguishment | 0 | 40,199 | 36,914
Net (gains) losses on investments and other financial instruments | 14,141 | 7,463 | (5,861)
Change in certain assets and liabilities: |  |  |
Accrued investment income | (3,596) | (3,276) | (1,905)
Reinsurance recoverable on loss reserves | (5,062) | 38,665 | 28,137
Reinsurance recoverable on paid losses | 8,185 | 18,194 | (35,606)
Premiums receivable | (499) | (1,460) | (496)
Deferred insurance policy acquisition costs | 4,471 | 2,609 | (110)
Profit commission receivable | 5,108 | 4,724 | (19,245)
Loss reserves | (52,609) | (325,534) | 2,985
Unearned premiums | (37,510) | (46,401) | (45,409)
Return premium accrual | (4,400) | (11,800) | 7,200
Current income taxes | (4,143) | (8,549) | 5,429
Other, net | 8,025 | (4,827) | 990
Net cash provided by operating activities | 712,962 | 650,012 | 696,317
Cash flows from investing activities: |  |  |
Purchases of investments | (1,469,540) | (674,406) | (1,531,129)
Proceeds from sales of investments | 376,598 | 399,661 | 473,904
Proceeds from maturity of fixed income securities | 913,415 | 688,484 | 900,591
Proceeds from sale of property and equipment | 2,336 | 0 | 0
Additions to property and equipment | (1,999) | (3,254) | (4,115)
Net cash (used in) provided by investing activities | (179,190) | 410,485 | (160,749)
Cash flows from financing activities: |  |  |
Conversion / purchase of convertible junior subordinated debentures | (28,637) | (89,118) | (98,610)
Redemption of 5.75% senior notes | 0 | (242,296) | 0
Repayment of FHLB advance | 0 | (155,000) | 0
Cash portion of loss on debt extinguishment | 0 | (39,514) | (36,914)
Repurchase of common stock | (337,182) | (385,573) | (290,818)
Dividends paid | (122,965) | (110,947) | (94,219)
Payment of withholding taxes related to share-based compensation net share settlement | (7,257) | (10,094) | (6,729)
Net cash used in financing activities | (496,041) | (1,032,542) | (527,290)
Net increase in cash and cash equivalents and restricted cash and cash equivalents | 37,731 | 27,955 | 8,278
Cash and cash equivalents and restricted cash and cash equivalents at beginning of year | 332,913 | 304,958 | 296,680
Cash and cash equivalents and restricted cash and cash equivalents at end of year | $ 370,644 | $ 332,913 | $ 304,958

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