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Income Per Share - Basis for Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Numerator: |  |  |
Income from continuing operations | $ 54,403 | $ 109,891 | $ 167,144
Less: Net income (loss) attributable to noncontrolling interest | 104 | 239 | (183)
Less: Preferred stock dividends | 0 | 18,437 | 34,931
Income from continuing operations attributable to Belden common stockholders | 54,299 | 91,215 | 132,396
Loss from discontinued operations, net of tax | (99,513) | (486,667) | (6,433)
Gain on disposal | (9,948) | 0 | 0
Net income (loss) attributable to Belden common stockholders | $ (55,162) | $ (395,452) | $ 125,963
Denominator: |  |  |
Weighted average shares outstanding, basic (in shares) | 44,778 | 42,203 | 40,675
Effect of dilutive common stock equivalents (in shares) | 159 | 213 | 281
Weighted average shares outstanding, diluted (in shares) | 44,937 | 42,416 | 40,956

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