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Fair Values of Company's Pension Plan By Asset Category (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 3,947 $ 3,206 $ 2,813
Total Fair Value
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3,947 3,205  
Total Fair Value | Mutual money market
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 32 16  
Total Fair Value | International
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 312 240  
Total Fair Value | Real Estate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   33  
Total Fair Value | Large Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,589 1,279  
Total Fair Value | Small And Mid Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,148 873  
Total Fair Value | Commodities
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   29  
Total Fair Value | Core Bond
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 751 639  
Total Fair Value | High Yield Corporate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 115 96  
Fair Value, Inputs, Level 1
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 3,947 3,205  
Fair Value, Inputs, Level 1 | Mutual money market
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 32 16  
Fair Value, Inputs, Level 1 | International
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 312 240  
Fair Value, Inputs, Level 1 | Real Estate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   33  
Fair Value, Inputs, Level 1 | Large Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,589 1,279  
Fair Value, Inputs, Level 1 | Small And Mid Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 1,148 873  
Fair Value, Inputs, Level 1 | Commodities
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   29  
Fair Value, Inputs, Level 1 | Core Bond
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 751 639  
Fair Value, Inputs, Level 1 | High Yield Corporate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 115 96  
Fair Value, Inputs, Level 2
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 | Mutual money market
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 | International
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 | Real Estate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   0  
Fair Value, Inputs, Level 2 | Large Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 | Small And Mid Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 | Commodities
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   0  
Fair Value, Inputs, Level 2 | Core Bond
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 2 | High Yield Corporate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 | Mutual money market
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 | International
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 | Real Estate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   0  
Fair Value, Inputs, Level 3 | Large Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 | Small And Mid Cap
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 | Commodities
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets   0  
Fair Value, Inputs, Level 3 | Core Bond
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets 0 0  
Fair Value, Inputs, Level 3 | High Yield Corporate
      
Schedule Of Fair Value Of Plan Assets [Line Items]      
Defined Benefit Plan, Fair Value of Plan Assets $ 0 $ 0