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CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (unaudited) - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | AOCI Attributable to Parent | Retained Earnings | Treasury shares | Parent
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2021 |  | 18,111 |  |  |  |  |
Par value, beginning balance at Dec. 31, 2021 |  | $ 25 |  |  |  |  |
Beginning balance at Dec. 31, 2021 | $ 1,223,552 |  | $ 692,053 | $ 2,056 | $ 1,167,475 | $ (638,057) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation (in shares) |  | 161 |  |  |  |  |
Share-based compensation |  |  | 11,580 |  |  |  | $ 11,580
Stock issued under employee stock purchase plan (in shares) |  | 30 |  |  |  |  |
Stock issued under employee stock purchase plan |  |  |  |  |  | 4,725 | 4,725
Other comprehensive income | (902) |  |  | (902) |  |  | (902)
Net income (loss) |  |  |  |  | (49,982) |  | (49,982)
Ending balance (in shares) at Sep. 30, 2022 |  | 18,302 |  |  |  |  |
Par value, ending balance at Sep. 30, 2022 |  | $ 25 |  |  |  |  |
Ending balance at Sep. 30, 2022 | 1,188,973 |  | 703,633 | 1,154 | 1,117,493 | (633,332) |
Beginning balance (in shares) at Jun. 30, 2022 |  | 18,180 |  |  |  |  |
Par value, beginning balance at Jun. 30, 2022 |  | $ 25 |  |  |  |  |
Beginning balance at Jun. 30, 2022 | 1,232,371 |  | 698,982 | 2,744 | 1,163,952 | (633,332) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation (in shares) |  | 122 |  |  |  |  |
Share-based compensation |  |  | 4,651 |  |  |  | 4,651
Other comprehensive income | (1,590) |  |  | (1,590) |  |  | (1,590)
Net income (loss) |  |  |  |  | (46,459) |  | (46,459)
Ending balance (in shares) at Sep. 30, 2022 |  | 18,302 |  |  |  |  |
Par value, ending balance at Sep. 30, 2022 |  | $ 25 |  |  |  |  |
Ending balance at Sep. 30, 2022 | 1,188,973 |  | 703,633 | 1,154 | 1,117,493 | (633,332) |
Beginning balance (in shares) at Dec. 31, 2022 |  | 18,128 |  |  |  |  |
Par value, beginning balance at Dec. 31, 2022 | 25 | $ 25 |  |  |  |  |
Beginning balance at Dec. 31, 2022 | 1,220,698 |  | 709,471 | 1,257 | 1,169,968 | (660,023) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation (in shares) |  | 415 |  |  |  |  |
Share-based compensation |  | $ 1 | 24,661 |  |  |  | 24,662
Shares repurchased by the Company and held as treasury shares (in shares) |  | (173) |  |  |  |  |
Shares repurchased by the Company and held as treasury shares |  |  |  |  |  | (16,853) | (16,853)
Cash dividends |  |  |  |  | (11,084) |  | (11,084)
Stock issued under employee stock purchase plan (in shares) |  | 41 |  |  |  |  |
Stock issued under employee stock purchase plan |  |  |  |  |  | 4,232 | 4,232
Other comprehensive income | 1,938 |  |  | 1,938 |  |  | 1,938
Net income (loss) |  |  |  |  | 119,552 |  | 119,552
Ending balance (in shares) at Sep. 30, 2023 |  | 18,411 |  |  |  |  |
Par value, ending balance at Sep. 30, 2023 | 26 | $ 26 |  |  |  |  |
Ending balance at Sep. 30, 2023 | 1,343,145 |  | 734,132 | 3,195 | 1,278,436 | (672,644) |
Beginning balance (in shares) at Jun. 30, 2023 |  | 18,450 |  |  |  |  |
Par value, beginning balance at Jun. 30, 2023 |  | $ 26 |  |  |  |  |
Beginning balance at Jun. 30, 2023 | 1,373,561 |  | 727,534 | 2,639 | 1,314,586 | (671,224) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation (in shares) |  | (23) |  |  |  |  |
Share-based compensation |  | $ 0 | 6,598 |  |  |  | 6,598
Shares repurchased by the Company and held as treasury shares (in shares) |  | (16) |  |  |  |  |
Shares repurchased by the Company and held as treasury shares |  |  |  |  |  | (1,420) | (1,420)
Cash dividends |  |  |  |  | (11,084) |  | (11,084)
Other comprehensive income | 556 |  |  | 556 |  |  | 556
Net income (loss) |  |  |  |  | (25,066) |  | $ (25,066)
Ending balance (in shares) at Sep. 30, 2023 |  | 18,411 |  |  |  |  |
Par value, ending balance at Sep. 30, 2023 | 26 | $ 26 |  |  |  |  |
Ending balance at Sep. 30, 2023 | $ 1,343,145 |  | $ 734,132 | $ 3,195 | $ 1,278,436 | $ (672,644) |

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