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Stock-Based Compensation - Additional Information (Detail) - $ / shares
3 Months Ended 12 Months Ended
Feb. 26, 2016
Feb. 28, 2015
Jan. 31, 2015
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2012
Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Restricted share award closing prices range per share, Minimum         $ 36    
January 28, 2017              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 13,200            
January 28, 2018              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 13,600            
Subsequent Event [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Number of shares exceeding annual award limit 112,000            
Number of shares limit on compensation plan 112,000            
Stock based compensation, Weighted Average Exercise Price, Granted $ 55.62            
Restricted share award closing prices range per share, Minimum $ 75            
Stock based compensation, Shares, Vested 13,200            
Restricted Shares [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock based compensation, Shares, Vested         2,034    
2010 Plan [Member] | Mr Albright [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Number of shares exceeding annual award limit         112,000    
Number of shares limit on compensation plan         50,000    
Number of shares reflected as stock compensation expense         112,000    
2010 Plan [Member] | Mr Albright [Member] | Common Stock [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock based compensation, Shares, Granted   20,000   40,000      
2010 Plan [Member] | Mr Albright [Member] | Common Stock [Member] | Subsequent Event [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock based compensation, Shares, Granted 40,000            
2010 Plan [Member] | Mr Albright [Member] | Restricted Shares [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock based compensation, Shares, Granted     8,000 94,000   96,000 96,000
2010 Plan [Member] | Mr Albright [Member] | Restricted Common Stock [Member] | Subsequent Event [Member]              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock based compensation, Shares, Granted 4,000