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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings
--- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2019 |  | 27,850,000 |  |
Beginning balance at Dec. 31, 2019 | $ 577,182 | $ 279 | $ 226,869 | $ 350,034
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 23,733 |  |  | 23,733
Stock options exercised (in shares) |  | 89,000 |  |
Stock options exercised | 4,237 | $ 1 | 4,236 |
Common stock issued under employee stock purchase plan (in shares) |  | 15,000 |  |
Common stock issued under employee stock purchase plan | 664 |  | 664 |
Share-based compensation expense | 11,138 |  | 11,138 |
Payment of dividends to shareholders | (20,869) |  | 10 | (20,879)
Payment of minimum tax withholdings on share-based awards (in shares) |  | (59,000) |  |
Payment of minimum tax withholdings on share-based awards | (3,508) |  |  | (3,508)
Repurchases and retirement of common stock (in shares) |  | (787,000) |  |
Repurchases and retirement of common stock | (45,248) | $ (8) |  | (45,240)
Issuance of share-based awards (in shares) |  | 208,000 |  |
Issuance of share-based awards | 0 | $ 1 | (1) |
Ending balance (in shares) at Dec. 31, 2020 |  | 27,316,000 |  |
Ending balance at Dec. 31, 2020 | 547,329 | $ 273 | 242,916 | 304,140
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 105,859 |  |  | 105,859
Stock options exercised (in shares) |  | 69,000 |  |
Stock options exercised | 3,706 | $ 1 | 3,705 |
Common stock issued under employee stock purchase plan (in shares) |  | 12,000 |  |
Common stock issued under employee stock purchase plan | 911 |  | 911 |
Share-based compensation expense | 10,929 |  | 10,929 |
Payment of dividends to shareholders | (22,976) |  | 14 | (22,990)
Payment of minimum tax withholdings on share-based awards (in shares) |  | (39,000) |  |
Payment of minimum tax withholdings on share-based awards | (3,115) |  |  | (3,115)
Repurchases and retirement of common stock (in shares) |  | (535,000) |  |
Repurchases and retirement of common stock | (48,989) | $ (5) |  | (48,984)
Issuance of share-based awards (in shares) |  | 146,000 |  |
Issuance of share-based awards | $ 0 | $ 1 | (1) |
Ending balance (in shares) at Dec. 31, 2021 | 26,968,788 | 26,969,000 |  |
Ending balance at Dec. 31, 2021 | $ 593,654 | $ 270 | 258,474 | 334,910
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Net income | 193,191 |  |  | 193,191
Stock options exercised (in shares) |  | 3,000 |  |
Stock options exercised | 206 |  | 206 |
Common stock issued under employee stock purchase plan (in shares) |  | 10,000 |  |
Common stock issued under employee stock purchase plan | 783 |  | 783 |
Share-based compensation expense | 11,376 |  | 11,376 |
Payment of dividends to shareholders | (25,865) |  | 17 | (25,882)
Payment of minimum tax withholdings on share-based awards (in shares) |  | (31,000) |  |
Payment of minimum tax withholdings on share-based awards | (3,330) |  |  | (3,330)
Repurchases and retirement of common stock (in shares) |  | (600,000) |  |
Repurchases and retirement of common stock | (62,771) | $ (6) |  | (62,765)
Issuance of share-based awards (in shares) |  | 111,000 |  |
Issuance of share-based awards | $ 0 | $ 1 | (1) |
Ending balance (in shares) at Dec. 31, 2022 | 26,461,293 | 26,462,000 |  |
Ending balance at Dec. 31, 2022 | $ 707,244 | $ 265 | $ 270,855 | $ 436,124

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