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Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating Activities |  |  |
Net income | $ 365,238 | $ 224,886 | $ 403,837
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 30,040 | 42,336 | 55,109
Stock-based compensation expense | 18,346 | 18,428 | 15,893
Undistributed gains of equity method investments | (17,083) | (12,946) | (69,873)
Distributions in excess of current year income of equity method investments | 16,052 | 43,184 | 2,910
Net realized and unrealized (gains) losses | 3,552 | 114,808 | (17,599)
Loss (gain) on disposal of fixed assets | (6) | 172 | 50
Changes in assets and liabilities: |  |  |
Increase in reserve for loss and loss expense, net of reinsurance recoverable | 318,075 | 381,176 | 307,972
Increase in unearned premiums, net of prepaid reinsurance | 306,926 | 200,210 | 172,460
(Increase) decrease in net federal income taxes | 9,082 | (25,932) | (542)
Increase in premiums receivable | (227,392) | (140,500) | (109,173)
Increase in deferred policy acquisition costs | (56,240) | (41,709) | (38,337)
Increase in accrued investment income | (7,172) | (10,920) | (3,243)
Increase (decrease) in accrued salaries and benefits | 6,430 | (3,092) | 7,216
(Increase) decrease in other assets | (23,195) | (37,561) | (33,379)
Increase in other liabilities | 16,255 | 49,869 | 78,121
Net cash provided by (used in) operating activities | 758,908 | 802,409 | 771,422
Investing Activities |  |  |
Purchases of fixed income securities, held-to-maturity | 0 | (6,691) | (16,250)
Purchases of fixed income securities, available-for-sale | (2,438,851) | (2,648,974) | (2,165,555)
Purchases of commercial mortgage loans | (42,114) | (64,008) | (50,204)
Purchases of equity securities | (24,166) | (26,675) | (88,640)
Purchases of alternative investments and other investments | (97,597) | (73,408) | (85,044)
Purchases of short-term investments | (4,479,918) | (4,506,500) | (4,345,140)
Sales of fixed income securities, available-for-sale | 1,221,918 | 1,211,739 | 502,911
Proceeds from commercial mortgage loans | 2,711 | 10,498 | 714
Sales of short-term investments | 4,611,342 | 4,513,940 | 4,306,684
Redemption and maturities of fixed income securities, held-to-maturity | 8,458 | 4,351 | 4,192
Redemption and maturities of fixed income securities, available-for-sale | 509,220 | 669,211 | 1,217,555
Sales of equity securities | 53,344 | 186,144 | 99,235
Sales of other investments | 900 | 3,281 | 5,428
Distributions from alternative investments and other investments | 11,029 | 18,664 | 17,497
Purchases of property and equipment | (22,631) | (26,019) | (22,163)
Net cash provided by (used in) investing activities | (686,355) | (734,447) | (618,780)
Financing Activities |  |  |
Dividends to preferred stockholders | (9,200) | (9,200) | (9,353)
Dividends to common stockholders | (73,827) | (66,920) | (60,136)
Acquisition of treasury stock | (7,930) | (18,344) | (9,050)
Net proceeds from stock purchase and compensation plans | 9,133 | 9,086 | 7,976
Preferred stock issued, net of issuance costs | 0 | 0 | (479)
Net proceeds from the issuance | 20,000 | 60,000 | 0
Repayment of borrowings | (20,000) | (60,000) | (50,000)
Repayment of finance lease obligations | (2,666) | (2,438) | (1,768)
Net cash provided by (used in) financing activities | (84,490) | (87,816) | (122,810)
Net increase (decrease) in cash and restricted cash | (11,937) | (19,854) | 29,832
Cash and restricted cash, beginning of year | 25,209 | 45,063 | 15,231
Cash and restricted cash, end of year | $ 13,272 | $ 25,209 | $ 45,063

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