Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plans (Details)

v3.3.1.900
Stock-Based Compensation Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 02, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
May. 06, 2014
Mar. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares available for issuance (in shares)   261,880        
Stock-based compensation   $ 2,081 $ 1,739 $ 1,576    
Tax withholding associated with awards issued   342 314 257    
Compensation expense not yet recognized   $ 962        
Weighted average amortization period of compensation not yet recognized   1 year 10 months 24 days        
Total stock-based compensation expense, net of income tax benefit   $ 2,081 1,739 1,576    
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation   2,040 1,614 1,576    
Total stock-based compensation expense, net of income tax benefit   2,040 1,614 1,576    
Restricted Stock [Member] | Contract Costs [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation   1,281 1,070 970    
Stock-based compensation included in contract costs   2,081 1,739 1,576    
Income tax benefit recognized for stock-based compensation   (800) (669) (606)    
Total stock-based compensation expense, net of income tax benefit   1,281 1,070 970    
Restricted Stock [Member] | Non-employee Director [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation   617 510 413    
Total stock-based compensation expense, net of income tax benefit   617 510 413    
Restricted Stock [Member] | Employees [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock-based compensation   1,423 1,104 1,163    
Total stock-based compensation expense, net of income tax benefit   $ 1,423 $ 1,104 $ 1,163    
Restricted Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares authorized (in shares)   500,000     250,000  
Restricted Stock [Member] | Non-employee Director [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock awarded (in shares)   9,000 10,800      
Grant date fair value (in dollars per share)   $ 68.58 $ 47.22      
Restricted Stock [Member] | Employees [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Restricted stock awarded (in shares) 7,602          
Grant date fair value (in dollars per share) $ 83.20          
Vesting period   3 years        
Vested award is paid in our shares 100.00%         100.00%