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Stockholders' Equity - Summary of Assumptions Used to Calculate the Grant Date Fair Value Based on Total Shareholder Return (Parenthetical) (Detail)
12 Months Ended
Dec. 31, 2015
William V. Hickey [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Expected Price volatility 31.50%
Risk-free interest rate 0.36%
Jerome A. Peribere [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Expected Price volatility 31.50%
Risk-free interest rate 0.36%