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CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Stock | Retained Earnings | Treasury Stock | Accumulated Other Comprehensive Income (Loss) | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2022 | $ 734,426 | $ 2,236,869 | $ (619,862) | $ (3,802) | $ 2,347,631
Balance (in shares) at Dec. 31, 2022 | 82,593 |  | (31,994) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  | (22,071) |  |  | (22,071)
Stock awards | $ 57 |  |  |  | 57
Stock awards (in shares) | 130 |  |  |  |
Employee income tax paid on stock awards |  |  | $ (585) |  | (585)
Employee income tax paid on stock awards (in shares) |  |  | (32) |  |
Sale of common stock under employee stock purchase plan | $ 1,218 |  |  |  | 1,218
Sale of common stock under employee stock purchase plan (in shares) | 78 |  |  |  |
Stock based compensation expense | $ 4,329 |  |  |  | 4,329
Treasury stock purchases |  |  | $ (100,001) |  | (100,001)
Treasury stock purchases (in shares) |  |  | (5,067) |  |
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  | 1,480 | 1,480
Balance at Mar. 31, 2023 | $ 740,030 | 2,214,798 | $ (720,448) | (2,322) | 2,232,058
Balance (in shares) at Mar. 31, 2023 | 82,801 |  | (37,093) |  |
Balance at Dec. 31, 2022 | $ 734,426 | 2,236,869 | $ (619,862) | (3,802) | 2,347,631
Balance (in shares) at Dec. 31, 2022 | 82,593 |  | (31,994) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  |  |  |  | 16,826
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  |  | 3,618
Balance at Sep. 30, 2023 | $ 750,133 | 2,253,695 | $ (866,946) | (184) | 2,136,698
Balance (in shares) at Sep. 30, 2023 | 82,840 |  | (41,620) |  |
Balance at Mar. 31, 2023 | $ 740,030 | 2,214,798 | $ (720,448) | (2,322) | 2,232,058
Balance (in shares) at Mar. 31, 2023 | 82,801 |  | (37,093) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  | 15,419 |  |  | 15,419
Stock based compensation expense | $ 4,246 |  |  |  | 4,246
Treasury stock purchases |  |  | $ (95,998) |  | (95,998)
Treasury stock purchases (in shares) |  |  | (3,335) |  |
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  | 1,514 | 1,514
Balance at Jun. 30, 2023 | $ 744,276 | 2,230,217 | $ (816,446) | (808) | 2,157,239
Balance (in shares) at Jun. 30, 2023 | 82,801 |  | (40,428) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  | 23,478 |  |  | 23,478
Sale of common stock under employee stock purchase plan | $ 1,536 |  |  |  | 1,536
Sale of common stock under employee stock purchase plan (in shares) | 39 |  |  |  |
Stock based compensation expense | $ 4,321 |  |  |  | 4,321
Treasury stock purchases |  |  | $ (50,500) |  | (50,500)
Treasury stock purchases (in shares) |  |  | (1,192) |  |
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  | 624 | 624
Balance at Sep. 30, 2023 | $ 750,133 | 2,253,695 | $ (866,946) | (184) | 2,136,698
Balance (in shares) at Sep. 30, 2023 | 82,840 |  | (41,620) |  |
Balance at Dec. 31, 2023 | $ 754,362 | 2,271,211 | $ (912,396) | 325 | 2,113,502
Balance (in shares) at Dec. 31, 2023 | 82,840 |  | (42,615) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  | 60,298 |  |  | 60,298
Stock awards (in shares) | 269 |  |  |  |
Employee income tax paid on stock awards |  |  | $ (6,930) |  | (6,930)
Employee income tax paid on stock awards (in shares) |  |  | (117) |  |
Sale of common stock under employee stock purchase plan | $ 1,446 |  |  |  | 1,446
Sale of common stock under employee stock purchase plan (in shares) | 29 |  |  |  |
Stock based compensation expense | $ 5,510 |  |  |  | 5,510
Treasury stock purchases |  |  | $ (8,750) |  | (8,750)
Treasury stock purchases (in shares) |  |  | (136) |  |
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  | (173) | (173)
Balance at Mar. 31, 2024 | $ 761,318 | 2,331,509 | $ (928,076) | 152 | 2,164,903
Balance (in shares) at Mar. 31, 2024 | 83,138 |  | (42,868) |  |
Balance at Dec. 31, 2023 | $ 754,362 | 2,271,211 | $ (912,396) | 325 | 2,113,502
Balance (in shares) at Dec. 31, 2023 | 82,840 |  | (42,615) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  |  |  |  | 225,585
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  |  | 50
Balance at Sep. 30, 2024 | $ 772,320 | 2,496,796 | $ (957,994) | 375 | 2,311,497
Balance (in shares) at Sep. 30, 2024 | 83,601 |  | (43,263) |  |
Balance at Mar. 31, 2024 | $ 761,318 | 2,331,509 | $ (928,076) | 152 | 2,164,903
Balance (in shares) at Mar. 31, 2024 | 83,138 |  | (42,868) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  | 75,578 |  |  | 75,578
Stock awards (in shares) | 1 |  |  |  |
Stock based compensation expense | $ 4,812 |  |  |  | 4,812
Treasury stock purchases |  |  | $ (13,453) |  | (13,453)
Treasury stock purchases (in shares) |  |  | (177) |  |
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  | (660) | (660)
Balance at Jun. 30, 2024 | $ 766,130 | 2,407,087 | $ (941,529) | (508) | 2,231,180
Balance (in shares) at Jun. 30, 2024 | 83,139 |  | (43,045) |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net Income (loss) |  | 89,709 |  |  | 89,709
Sale of common stock under employee stock purchase plan | $ 1,418 |  |  |  | 1,418
Sale of common stock under employee stock purchase plan (in shares) | 18 |  |  |  |
Issuance of common stock upon warrant exercise, net (in Shares) | 444 |  |  |  |
Stock based compensation expense | $ 4,772 |  |  |  | 4,772
Treasury stock purchases |  |  | $ (16,465) |  | (16,465)
Treasury stock purchases (in shares) |  |  | (218) |  |
Net unrealized appreciation (depreciation) on marketable securities, net of taxes |  |  |  | 883 | 883
Balance at Sep. 30, 2024 | $ 772,320 | $ 2,496,796 | $ (957,994) | $ 375 | $ 2,311,497
Balance (in shares) at Sep. 30, 2024 | 83,601 |  | (43,263) |  |

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