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Stock-Based Compensation Plans (Additional Information) (Details) - USD ($)
12 Months Ended
May. 01, 2012
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Proceeds from Stock Options Exercised   $ 736,000 $ 338,000  
Percentage of total compensation   4.00%    
Stock Option and Incentive Plan 2003 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares of stock reserved and available for issuance 800,000      
Stock Option and Incentive Plan 2012 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock based compensation, vesting period   5 years    
Stock based compensation, option granted, contractual life   10 years    
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation   $ 51,000 81,000 $ 134,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   59,000 19,000 25,000
Unrecognized compensation cost for nonvested stock options   $ 31,000    
Unrecognized compensation cost, recognition period   2 years 7 months 6 days    
Total intrinsic value of options exercised   $ 573,000 134,000 153,000
Restricted Stock Awards and Management Stock Purchase Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation   393,000 321,000 222,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   $ 137,000 112,000 78,000
Unrecognized compensation cost, recognition period   2 years 7 months 6 days    
Unrecognized compensation cost related to nonvested shares   $ 780,000    
Management Stock Purchase Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price as a percentage of fair market value on the date of grant   0.00%    
Stock based compensation, vesting period   2 years    
Share-based compensation   $ 66,000 67,000 73,000
Granted   9,379    
Long-Term Performance Share Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation   $ 330,000 151,000 200,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense   $ 116,000 53,000 70,000
Unrecognized compensation cost, recognition period   1 year 6 months    
Unrecognized compensation cost related to nonvested shares   $ 271,000    
Granted   24,561    
Deferred Stock Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation   $ 62,000 $ 46,000 $ 40,000
Unrecognized compensation cost, recognition period   11 years 3 months 18 days    
Unrecognized compensation cost related to nonvested shares   $ 225,000    
Percentage of total compensation   10.00%    
Percentage vested on 65th birthday   100.00%    
Granted   2,406 2,020 2,304
Qualified Stock Options [Member] | Stock Option and Incentive Plan 2012 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price as a percentage of fair market value on the date of grant 100.00%      
Nonqualified Stock Options [Member] | Stock Option and Incentive Plan 2012 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise price as a percentage of fair market value on the date of grant 85.00%      
Executive Officer [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Forfeiture rate   0.00%    
Management [Member] | Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Forfeiture rate   13.00%