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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) |  | 39 |  |  |  |  |
Share-based compensation |  |  | 6,929 |  |  |  | $ 6,929
Stock issued under employee stock purchase plan (in shares) |  | 30 |  |  |  |  |
Stock issued under employee stock purchase plan |  |  |  |  |  | 4,725 | 4,725
Other comprehensive income (loss) | 688 |  |  | 688 |  |  | 688
Net income (loss) |  |  |  |  | (3,523) |  | (3,523)
Ending balance (in shares) at Jun. 30, 2022 |  | 18,180 |  |  |  |  |
Par value, ending balance at Jun. 30, 2022 |  | $ 25 |  |  |  |  |
Ending balance at Jun. 30, 2022 | 1,232,371 |  | 698,982 | 2,744 | 1,163,952 | (633,332) |
Beginning balance (in shares) at Mar. 31, 2022 |  | 18,119 |  |  |  |  |
Par value, beginning balance at Mar. 31, 2022 |  | $ 25 |  |  |  |  |
Beginning balance at Mar. 31, 2022 | 1,222,296 |  | 695,323 | 5,411 | 1,159,594 | (638,057) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation (in shares) |  | 31 |  |  |  |  |
Share-based compensation |  |  | 3,659 |  |  |  | 3,659
Stock issued under employee stock purchase plan (in shares) |  | 30 |  |  |  |  |
Stock issued under employee stock purchase plan |  |  |  |  |  | 4,725 | 4,725
Other comprehensive income (loss) | (2,667) |  |  | (2,667) |  |  | (2,667)
Net income (loss) |  |  |  |  | 4,358 |  | 4,358
Ending balance (in shares) at Jun. 30, 2022 |  | 18,180 |  |  |  |  |
Par value, ending balance at Jun. 30, 2022 |  | $ 25 |  |  |  |  |
Ending balance at Jun. 30, 2022 | 1,232,371 |  | 698,982 | 2,744 | 1,163,952 | (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) |  | 438 |  |  |  |  |
Share-based compensation |  | $ 1 | 18,063 |  |  |  | 18,064
Shares repurchased by the Company and held as treasury shares (in shares) |  | (157) |  |  |  |  |
Shares repurchased by the Company and held as treasury shares |  |  |  |  |  | (15,433) | (15,433)
Stock issued under employee stock purchase plan (in shares) |  | 41 |  |  |  |  |
Stock issued under employee stock purchase plan |  |  |  |  |  | 4,232 | 4,232
Other comprehensive income (loss) | 1,383 |  |  | 1,382 |  |  | 1,382
Net income (loss) |  |  |  |  | 144,618 |  | 144,618
Ending balance (in shares) at Jun. 30, 2023 |  | 18,450 |  |  |  |  |
Par value, ending balance at Jun. 30, 2023 | 26 | $ 26 |  |  |  |  |
Ending balance at Jun. 30, 2023 | 1,373,561 |  | 727,534 | 2,639 | 1,314,586 | (671,224) |
Beginning balance (in shares) at Mar. 31, 2023 |  | 17,998 |  |  |  |  |
Par value, beginning balance at Mar. 31, 2023 |  | $ 25 |  |  |  |  |
Beginning balance at Mar. 31, 2023 | 1,271,397 |  | 714,506 | 3,242 | 1,226,117 | (672,493) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Share-based compensation (in shares) |  | 443 |  |  |  |  |
Share-based compensation |  | $ 1 | 13,028 |  |  |  | 13,029
Shares repurchased by the Company and held as treasury shares (in shares) |  | (32) |  |  |  |  |
Shares repurchased by the Company and held as treasury shares |  |  |  |  |  | (2,963) | (2,963)
Stock issued under employee stock purchase plan (in shares) |  | 41 |  |  |  |  |
Stock issued under employee stock purchase plan |  |  |  |  |  | 4,232 | 4,232
Other comprehensive income (loss) | (603) |  |  | (603) |  |  | (603)
Net income (loss) |  |  |  |  | 88,469 |  | $ 88,469
Ending balance (in shares) at Jun. 30, 2023 |  | 18,450 |  |  |  |  |
Par value, ending balance at Jun. 30, 2023 | 26 | $ 26 |  |  |  |  |
Ending balance at Jun. 30, 2023 | $ 1,373,561 |  | $ 727,534 | $ 2,639 | $ 1,314,586 | $ (671,224) |

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