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v3.22.2

Condensed Consolidated Statement of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Shares [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Treasury Shares [Member]
--- | --- | --- | --- | --- | ---
Shares Outstanding, Beginning Balance at Dec. 31, 2020 |  | 28,813,849 |  |  |
Stockholders' Equity, Beginning Balance at Dec. 31, 2020 | $ 1,258,698 | $ 301 | $ 339,001 | $ 948,453 | $ (29,057)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 192,473 |  |  | 192,473 |
Stock options exercised, shares |  | 428,100 |  |  |
Stock options exercised | 10,630 |  | 1,230 |  | 9,400
Stock-based compensation expense | 4,405 |  | 4,405 |  |
Deferral of executive and director compensation | 338 |  | 338 |  |
Deferred Compensation Arrangement with Individual, Shares Issued |  | 76,181 |  |  |
Deferred Compensation Arrangement with Individual, Distribution Paid | 0 |  | (1,673) |  | 1,673
Shares Outstanding, Ending Balance at Jun. 30, 2021 |  | 29,318,130 |  |  |
Stockholders' Equity, Ending Balance at Jun. 30, 2021 | 1,466,544 | $ 301 | 343,301 | 1,140,926 | (17,984)
Shares Outstanding, Beginning Balance at Mar. 31, 2021 |  | 29,185,630 |  |  |
Stockholders' Equity, Beginning Balance at Mar. 31, 2021 | 1,353,422 | $ 301 | 340,696 | 1,033,319 | (20,894)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 107,607 |  |  | 107,607 |
Stock options exercised, shares |  | 132,500 |  |  |
Stock options exercised | 3,374 |  | 464 |  | 2,910
Stock-based compensation expense | 2,141 |  | 2,141 |  |
Shares Outstanding, Ending Balance at Jun. 30, 2021 |  | 29,318,130 |  |  |
Stockholders' Equity, Ending Balance at Jun. 30, 2021 | 1,466,544 | $ 301 | 343,301 | 1,140,926 | (17,984)
Shares Outstanding, Beginning Balance at Dec. 31, 2021 |  | 28,499,630 |  |  |
Stockholders' Equity, Beginning Balance at Dec. 31, 2021 | 1,624,184 | $ 301 | 347,452 | 1,345,321 | (68,890)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 228,677 |  |  | 228,677 |
Stock options exercised, shares |  | 30,400 |  |  |
Stock options exercised | 770 |  | (550) |  | 1,320
Stock-based compensation expense | 3,849 |  | 3,849 |  |
Repurchase of common shares, shares |  | (860,000) |  |  |
Repurchase of common shares | (40,235) |  |  |  | (40,235)
Deferral of executive and director compensation | 1,022 |  | 1,022 |  |
Deferred Compensation Arrangement with Individual, Shares Issued |  | 90,553 |  |  |
Deferred Compensation Arrangement with Individual, Distribution Paid | 0 |  | (3,850) |  | 3,850
Shares Outstanding, Ending Balance at Jun. 30, 2022 |  | 27,760,583 |  |  |
Stockholders' Equity, Ending Balance at Jun. 30, 2022 | 1,818,267 | $ 301 | 347,923 | 1,573,998 | (103,955)
Shares Outstanding, Beginning Balance at Mar. 31, 2022 |  | 28,288,783 |  |  |
Stockholders' Equity, Beginning Balance at Mar. 31, 2022 | 1,703,689 | $ 301 | 346,291 | 1,437,160 | (80,063)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 136,838 |  |  | 136,838 |
Stock options exercised, shares |  | 21,800 |  |  |
Stock options exercised | 564 |  | (386) |  | 950
Stock-based compensation expense | $ 2,018 |  | 2,018 |  |
Repurchase of common shares, shares | 600,000 | (550,000) |  |  |
Repurchase of common shares | $ (24,842) |  |  |  | (24,842)
Shares Outstanding, Ending Balance at Jun. 30, 2022 |  | 27,760,583 |  |  |
Stockholders' Equity, Ending Balance at Jun. 30, 2022 | $ 1,818,267 | $ 301 | $ 347,923 | $ 1,573,998 | $ (103,955)

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