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Quantitative Range of Significant Unobservable Inputs Used in Calculation of Fair Value of Continent Consideration Liability (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Dec. 31, 2013
Mar. 29, 2014
Fair Value, Inputs, Level 3
Revenue Earnout
Mar. 29, 2014
Fair Value, Inputs, Level 3
Revenue Earnout
Weighted Average
Mar. 29, 2014
Fair Value, Inputs, Level 3
Revenue Earnout
Minimum
Mar. 29, 2014
Fair Value, Inputs, Level 3
Revenue Earnout
Maximum
Business Acquisition, Contingent Consideration [Line Items]            
Weighted average cost of capital       17.20%    
Probability weighting of achieving revenue forecasts       33.00% 20.00% 55.00%
Valuation technique     Discounted cash flow      
Fair Value $ 1,435 $ 1,384 $ 1,435