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Parent Corporation Statements of Cash Flows (Details) - 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: |  |  |
Stock-based compensation expense | 18,346 | 18,428 | 15,893
Undistributed losses 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
Amortization - other | 30,040 | 42,336 | 55,109
Changes in assets and liabilities: |  |  |
(Increase) decrease in net federal income taxes | 9,082 | (25,932) | (542)
(Increase) decrease in other assets | (23,195) | (37,561) | (33,379)
Increase (decrease) in other liabilities | 16,255 | 49,869 | 78,121
Investing Activities |  |  |
Purchases of fixed income securities, available-for-sale | (2,438,851) | (2,648,974) | (2,165,555)
Purchases of equity securities | (24,166) | (26,675) | (88,640)
Purchases of short-term investments | (4,479,918) | (4,506,500) | (4,345,140)
Purchase of other investments | (97,597) | (73,408) | (85,044)
Redemption and maturities of fixed income securities, available-for-sale | 509,220 | 669,211 | 1,217,555
Sales of fixed income securities, available-for-sale | 1,221,918 | 1,211,739 | 502,911
Sales of equity securities | 53,344 | 186,144 | 99,235
Sales of short-term investments | 4,611,342 | 4,513,940 | 4,306,684
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)
Cash, beginning of year | 26 |  |
Cash, end of year | 180 | 26 |
Parent Company [Member] |  |  |
Operating Activities |  |  |
Net income | 365,238 | 224,886 | 403,837
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Equity in undistributed income of subsidiaries, net of tax | (316,612) | (152,555) | (297,220)
Stock-based compensation expense | 18,346 | 18,428 | 15,893
Net realized and unrealized investment (gains) losses | (996) | 17,855 | (1,898)
Undistributed losses of equity method investments | (279) | (2,240) | (1,859)
Distributions in excess of current year income of equity method investments | 766 | 0 | 0
Amortization - other | 1,020 | 154 | 1,076
Changes in assets and liabilities: |  |  |
Increase (decrease) in accrued long-term stock compensation | (579) | 136 | 2,727
(Increase) decrease in net federal income taxes | 1,538 | (3,875) | 3,843
(Increase) decrease in other assets | 963 | (1,961) | (7,251)
Increase (decrease) in other liabilities | 1,375 | (2,813) | (1,742)
Net cash provided by (used in) operating activities | 68,740 | 97,707 | 117,406
Investing Activities |  |  |
Purchases of fixed income securities, available-for-sale | (72,328) | (208,512) | (113,829)
Purchases of equity securities | (743) | (1,647) | (5,676)
Purchases of short-term investments | (233,129) | (362,213) | (330,843)
Purchase of other investments | (53,262) | (4,149) | (4,949)
Redemption and maturities of fixed income securities, available-for-sale | 29,619 | 35,527 | 51,524
Sales of fixed income securities, available-for-sale | 20,314 | 66,725 | 15,713
Sales of equity securities | 48,960 | 77,971 | 31,204
Sales of short-term investments | 248,588 | 385,254 | 311,225
Proceeds from Limited Partnership Investments | 20 | 0 | 959
Net cash provided by (used in) investing activities | (11,961) | (11,044) | (44,672)
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)
Proceeds from Related Party Debt | 27,000 | 0 | 0
Principal payments of borrowings from subsidiaries | (1,801) | (1,714) | (1,631)
Net cash provided by (used in) financing activities | (56,625) | (87,092) | (72,673)
Net increase (decrease) in cash | 154 | (429) | 61
Cash, beginning of year | 26 | 455 | 394
Cash, end of year | $ 180 | $ 26 | $ 455

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