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Stockholders' Equity - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Class of Stock [Line Items]    
Common Stock, Shares Authorized 200,000,000 200,000,000
The number of authorized shares of common stock, par value $ 0.01 $ 0.01
Business Acquisition Stockholders Rights Plan Exercise Description The rights will be exercisable only if a person or a group acquires or announces a tender or exchange offer to acquire 20% or more of our common stock or if we enter into other business combination transactions not approved by our board of directors.  
Business Acquisition Stockholders Rights Plan Expire Date Dec. 28, 2015  
Business Acquisition Stockholders Rights Plan Redeemable Per Stock $ 0.01  
Series D Junior Participating Preferred Stock
    
Class of Stock [Line Items]    
Preferred Stock, Par or Stated Value Per Share $ 0.01  
Stock Repurchased During Period, Shares 300,000  
Business Acquisition, Share Price $ 120  
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Unclassified Preferred Stock
    
Class of Stock [Line Items]    
Preferred Stock, Shares Authorized 25,000,000