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Stock-Based Incentive Plans - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based incentive plans, options expiry term   10 years        
Number of Options, Granted   123,739 222,059 144,296    
Number of shares issued   122,262 60,569 218,824    
Stock options outstanding   571,883 509,329 318,901   299,107
Weighted average fair value of options, granted   $ 5.90 $ 6.16 $ 8.70    
Aggregate intrinsic value for options outstanding   $ 3,100 $ 615 $ 118    
Options exercised   3,879 811 802    
Proceeds from exercise of stock options   $ 71 $ 15 $ 16    
Aggregate intrinsic value of options exercisable   22 107 46    
Total unrecognized compensation cost related to options   $ 1,200        
Cost of the options recognized over a weighted average period   3 years 2 months 12 days        
Granted value   $ 2,600 1,200 $ 3,100    
Total unrecognized compensation cost related to nonvested stock awards     $ 3,500      
Cost of stock awards recognized over a weighted average period   2 years 4 months 24 days        
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock awards granted   122,262 60,569 218,824    
Stock Awards outstanding   254,976 279,964 248,654   86,366
Total compensation expense recognized on stock awards   $ 1,900 $ 1,200 $ 359    
2015 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized 1,400,000          
Stock-based incentive plans, options expiry term 10 years          
Number of Options, Granted   123,739        
Stock awards granted   182,831        
2014 Performance Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized         1,000,000  
Number of shares issued       0    
Performance plan termination period       2015-05    
2014 Performance Plan [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise price of shares       100.00%    
Stock-Based Incentive Plan 2010 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized   980,000        
Stock-based incentive plans, options expiry term   10 years        
Number of stock awards allowed   0        
Stock options outstanding   346,225        
Stock plan termination period   2015-05        
Stock-Based Incentive Plan 2010 [Member] | Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock Awards outstanding   94,537        
Stock-Based Incentive Plan 2010 [Member] | Maximum [Member] | Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of stock awards allowed   280,000        
Stock-Based Incentive Plan 2004 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized   500,085        
Number of shares issued   0 0      
Stock options outstanding   104,750        
Stock plan termination period   2015-05        
Stock-based incentive plans, options expiry term   10 years        
Stock-Based Incentive Plan 2004 [Member] | Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock Awards outstanding   0        
Stock-Based Incentive Plan 2004 [Member] | Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares issued   0 0