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Stockholder's Equity - Additional Information (Detail) - $ / shares
 12 Months Ended
Mar. 01, 2014
Dec. 31, 2015
Dec. 31, 2014
Schedule Of Stockholders Equity [Line Items]      
Common stock, shares authorized   100,000,000 100,000,000
Common stock, par value   $ 0.01 $ 0.01
Preferred stock, shares authorized   40,000,000  
Preferred stock, par value   $ 1  
Unissued common stock reserved for stock - based incentive plans and convertible preferred stock issuance   6,000,000  
Sale of preferred stock 2,587,400    
Convertible preferred stock dividend, rate 6.25%    
Conversion rate of preferred stock 6,912,756    
Convertible preferred stock, conversion date   Mar. 03, 2014