Income Per Share - Basis for Income Per Share Computations (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Apr. 02, 2017	Apr. 03, 2016
Earnings Per Share [Abstract]
Net income	$ 25,581	$ 16,358
Less: Net loss attributable to noncontrolling interest	(106)	(99)
Less: Preferred stock dividends	8,733	0
Net income attributable to Belden common stockholders	$ 16,954	$ 16,457
Weighted average shares outstanding, basic (in shares)	42,216	42,008
Effect of dilutive common stock equivalents (in shares)	459	379
Weighted average shares outstanding, diluted (in shares)	42,675	42,387

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

+ References

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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- Definition

Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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- Definition

The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.

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No definition available.

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- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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