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Summary of Grant Date Fair Value of Awards Issued Based on Valuation Assumptions (Detail) - $ / shares
Feb. 23, 2016
Jan. 07, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Risk free interest rate   1.21%
Expected dividend yield used when simulating the total shareholder return   0.00%
Expected dividend yield used when simulating the Company's stock price   0.00%
Stock price volatility, minimum   21.09%
Stock price volatility, maximum   72.17%
Mr. Haugh    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Risk free interest rate 0.90%  
Expected dividend yield used when simulating the total shareholder return 0.00%  
Expected dividend yield used when simulating the Company's stock price 0.00%  
Stock price volatility, minimum 24.23%  
Stock price volatility, maximum 74.33%  
Minimum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning average stock price   $ 4.85
Valuation date stock price   $ 4.53
Correlation coefficients   0.04%
Minimum | Mr. Haugh    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning average stock price $ 4.86  
Valuation date stock price $ 5.52  
Correlation coefficients 0.06%  
Maximum    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning average stock price   $ 63.41
Valuation date stock price   $ 59.08
Correlation coefficients   0.47%
Maximum | Mr. Haugh    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Beginning average stock price $ 66.71  
Valuation date stock price $ 69.92  
Correlation coefficients 0.50%