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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Retained Earnings (Deficit) | Accumulated Other Comprehensive (Loss) Income | Treasury Stock, Common
--- | --- | --- | --- | --- | --- | ---
Balance beginning of period (in shares) at Dec. 31, 2020 |  | 52,536,482 |  |  |  |
Balance at beginning of period at Dec. 31, 2020 | $ 404,879 | $ 755 | $ 644,695 | $ 107,233 | $ 7,633 | $ (355,437)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) for the year | 1,164 |  |  | 1,164 |  |
Foreign currency translation | 193 |  |  |  | 193 |
Stock-based compensation (in shares) |  | 145,118 |  |  |  |
Stock-based compensation | 7,059 | $ 2 | 7,057 |  |  |
Stock repurchase (in shares) |  | (3,927,900) |  |  |  |
Stock repurchase | (66,731) |  |  |  |  | (66,731)
Common stock dividends | (16,286) |  |  | (16,286) |  |
Unrealized loss on derivative instruments | (6,967) |  |  |  | (6,967) |
Stock option exercises (in shares) |  | 200,782 |  |  |  |
Stock option exercises | 2,228 | $ 2 | 2,226 |  |  |
Balance end of period (in shares) at Dec. 31, 2021 |  | 48,954,482 |  |  |  |
Balance at end of period at Dec. 31, 2021 | 325,539 | $ 759 | 653,978 | 92,111 | 859 | (422,168)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) for the year | 112,258 |  |  | 112,258 |  |
Foreign currency translation | 198 |  |  |  | 198 |
Stock-based compensation (in shares) |  | 298,458 |  |  |  |
Stock-based compensation | 9,746 | $ 5 | 9,741 |  |  |
Stock repurchase (in shares) |  | (1,761,339) |  |  |  |
Stock repurchase | (34,285) |  |  |  |  | (34,285)
Common stock dividends | (16,128) |  |  | (16,128) |  |
Unrealized loss on derivative instruments | (1,939) |  |  |  | (1,939) |
Stock option exercises (in shares) |  | 184,195 |  |  |  |
Stock option exercises | 2,224 | $ 2 | 2,222 |  |  |
Balance end of period (in shares) at Dec. 31, 2022 |  | 47,675,796 |  |  |  |
Balance at end of period at Dec. 31, 2022 | 397,613 | $ 766 | 665,941 | 188,241 | (882) | (456,453)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income (loss) for the year | 231,252 |  |  | 231,252 |  |
Foreign currency translation | 975 |  |  |  | 975 |
Stock-based compensation (in shares) |  | 516,747 |  |  |  |
Stock-based compensation | 11,798 | $ 8 | 11,790 |  |  |
Stock repurchase (in shares) |  | (2,810,716) |  |  |  |
Stock repurchase | (76,206) |  |  |  |  | (76,206)
Common stock dividends | (15,570) |  |  | (15,570) |  |
Unrealized loss on derivative instruments | $ (521) |  |  |  | (521) |
Stock option exercises (in shares) | 11,433 | 11,433 |  |  |  |
Stock option exercises | $ 155 | $ 0 | 155 |  |  |
Balance end of period (in shares) at Dec. 31, 2023 |  | 45,393,260 |  |  |  |
Balance at end of period at Dec. 31, 2023 | $ 549,496 | $ 774 | $ 677,886 | $ 403,923 | $ (428) | $ (532,659)

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