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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - UNAUDITED - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Additional Paid-in Capital Adjustments due to adoption of new accounting standards | Treasury Stock | Accumulated Other Comprehensive Income (Loss) | Accumulated Earnings | Accumulated Earnings Adjustments due to adoption of new accounting standards | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period, shares at Dec. 31, 2021 |  | 32,495,000 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2021 | $ 440,244 | $ 705 | $ 488,303 |  | $ (930,106) | $ (38,353) | $ 916,060 |  | $ 3,635
Net income |  |  |  |  |  |  | 6,113 |  |
Unrealized gain (loss) on short-term investments, net of tax |  |  |  |  |  | (2) |  |  |
Foreign currency translation adjustments |  |  |  |  |  | (1,182) |  |  |
Total comprehensive income (loss) | 4,929 |  |  |  |  |  |  |  |
Repurchase of common stock | (23,801) | $ (1) | (7,804) |  | (15,996) |  |  |  |
Repurchase of common stock, shares |  | (389,000) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 650 |  | 650 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 12,000 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 5 | (5) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 476,000 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (34,000) |  |  |  |  |  |  |
Stock-based compensation expense | 5,581 |  | 5,581 |  |  |  |  |  |
Settlement of convertible debt securities, net of tax | (4,845) |  | (4,845) |  |  |  |  |  |
Dividends | (8,586) |  |  |  |  |  | (8,586) |  |
Balance, ending of period, shares at Mar. 31, 2022 |  | 32,560,000 |  |  |  |  |  |  |
Balance, ending of period at Mar. 31, 2022 | 414,172 | $ 709 | 472,078 | $ (9,802) | (946,102) | (39,537) | 923,389 | $ 9,802 | 3,635
Balance, beginning of period, shares at Dec. 31, 2021 |  | 32,495,000 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2021 | 440,244 | $ 705 | 488,303 |  | (930,106) | (38,353) | 916,060 |  | 3,635
Net income | 11,430 |  |  |  |  |  |  |  |
Unrealized gain (loss) on short-term investments, net of tax | 3 |  |  |  |  |  |  |  |
Foreign currency translation adjustments | (17,182) |  |  |  |  |  |  |  |
Total comprehensive income (loss) | (5,749) |  |  |  |  |  |  |  |
Balance, ending of period, shares at Jun. 30, 2022 |  | 32,195 |  |  |  |  |  |  |
Balance, ending of period at Jun. 30, 2022 | 377,022 | $ 709 | 479,271 |  | (967,659) | (55,532) | 920,233 |  |
Balance, beginning of period, shares at Mar. 31, 2022 |  | 32,560,000 |  |  |  |  |  |  |
Balance, beginning of period at Mar. 31, 2022 | 414,172 | $ 709 | 472,078 | $ (9,802) | (946,102) | (39,537) | 923,389 | $ 9,802 | 3,635
Net income | 5,317 |  |  |  |  |  | 5,317 |  |
Unrealized gain (loss) on short-term investments, net of tax | 5 |  |  |  |  | (5) |  |  |
Foreign currency translation adjustments | (16,000) |  |  |  |  | (16,000) |  |  |
Total comprehensive income (loss) | (10,678) |  |  |  |  |  |  |  |
Repurchase of common stock | 21,673 |  | (116) |  | (21,557) |  |  |  |
Repurchase of common stock, shares |  | (362,000) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 773 |  | 773 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 15,000 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 1 | (1) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 42,000 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans |  | $ (1) | 1 |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (60,000) |  |  |  |  |  |  |
Stock-based compensation expense | 6,536 |  | 6,536 |  |  |  |  |  |
Dividends | (8,473) |  |  |  |  |  | (8,473) |  |
Write-off of noncontrolling interest | (3,635) |  |  |  |  |  |  |  | $ (3,635)
Balance, ending of period, shares at Jun. 30, 2022 |  | 32,195 |  |  |  |  |  |  |
Balance, ending of period at Jun. 30, 2022 | $ 377,022 | $ 709 | 479,271 |  | (967,659) | (55,532) | 920,233 |  |
Balance, beginning of period, shares at Dec. 31, 2022 | 31,269,000 | 31,269 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2022 | $ 355,249 | $ 708 | 495,189 |  | (1,018,034) | (58,829) | 936,215 |  |
Net income |  |  |  |  |  |  | 20,928 |  |
Foreign currency translation adjustments |  |  |  |  |  | 2,843 |  |  |
Total comprehensive income (loss) | 23,771 |  |  |  |  |  |  |  |
Repurchase of common stock | (9,306) | $ (2) | (9,304) |  |  |  |  |  |
Repurchase of common stock, shares |  | (166) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 893 |  | 893 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 19 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 6 | (6) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 574 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (18,000) |  |  |  |  |  |  |
Stock-based compensation expense | 6,412 |  | 6,412 |  |  |  |  |  |
Dividends | (8,796) |  |  |  |  |  | (8,796) |  |
Balance, ending of period, shares at Mar. 31, 2023 |  | 31,678,000 |  |  |  |  |  |  |
Balance, ending of period at Mar. 31, 2023 | $ 368,223 | $ 712 | 493,184 |  | (1,018,034) | 55,986 | 948,347 |  |
Balance, beginning of period, shares at Dec. 31, 2022 | 31,269,000 | 31,269 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2022 | $ 355,249 | $ 708 | 495,189 |  | (1,018,034) | (58,829) | 936,215 |  |
Net income | 34,882 |  |  |  |  |  |  |  |
Unrealized gain (loss) on short-term investments, net of tax | 0 |  |  |  |  |  |  |  |
Foreign currency translation adjustments | 4,552 |  |  |  |  |  |  |  |
Total comprehensive income (loss) | $ 39,434 |  |  |  |  |  |  |  |
Balance, ending of period, shares at Jun. 30, 2023 | 31,751,000 | 31,751 |  |  |  |  |  |  |
Balance, ending of period at Jun. 30, 2023 | $ 383,311 | $ 713 | 501,486 |  | (1,018,034) | (54,277) | 953,423 |  |
Balance, beginning of period, shares at Mar. 31, 2023 |  | 31,678,000 |  |  |  |  |  |  |
Balance, beginning of period at Mar. 31, 2023 | 368,223 | $ 712 | 493,184 |  | (1,018,034) | 55,986 | 948,347 |  |
Net income | 13,954 |  |  |  |  |  | 13,954 |  |
Unrealized gain (loss) on short-term investments, net of tax | 0 |  |  |  |  |  |  |  |
Foreign currency translation adjustments | 1,709 |  |  |  |  | 1,709 |  |  |
Total comprehensive income (loss) | 15,663 |  |  |  |  |  |  |  |
Repurchase of common stock | (112) |  | (112) |  |  |  |  |  |
Repurchase of common stock, shares |  | (2) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 771 |  | 771 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 18 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 1 | (1) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 64 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (7,000) |  |  |  |  |  |  |
Stock-based compensation expense | 7,644 |  | 7,644 |  |  |  |  |  |
Dividends | $ (8,878) |  |  |  |  |  | (8,878) |  |
Balance, ending of period, shares at Jun. 30, 2023 | 31,751,000 | 31,751 |  |  |  |  |  |  |
Balance, ending of period at Jun. 30, 2023 | $ 383,311 | $ 713 | $ 501,486 |  | $ (1,018,034) | $ (54,277) | $ 953,423 |  |

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