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Stockholders' Equity (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
May 17, 2016
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Payments of Ordinary Dividends, Common Stock         $ 831,000 $ 925,000
Unrecognized share based compensation, expected term (in Duration)         1 year 9 months 18 days  
Directors compensation expense   $ 82,000   $ 314,000 $ 212,000 $ 406,000
Common Stock, Dividends, Per Share, Declared   $ 0.025   $ 0.025 $ 0.050 $ 0.050
Dividends, Common Stock, Cash   $ 400,000        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased     25,000,000      
ESPP            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares purchased through Employee Stock Purchase Plan (in Shares)   11,510        
Weighted average purchase price of ESPP shares purchased during the period (in Dollars per share)   $ 19.92        
Share-based compensation expense   $ 67,000   $ 55,000 $ 144,000 $ 129,000
Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense   300,000   $ 400,000 600,000 800,000
Stock Granted, Value, Share-based Compensation, Net of Forfeitures     $ 300,000      
Unrecognized share based compensation   $ 2,500,000     $ 2,500,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     16,900      
Restricted Stock | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years      
Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage         20000.00%  
Share based compensation awards, options outstanding at period end (in Shares)   1,864,754     1,864,754  
Share based compensation awards, options outstanding and unvested at period end (in Shares)   694,899     694,899  
Share-based compensation expense   $ 600,000     $ 1,100,000 $ 1,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years      
Stock Granted, Value, Share-based Compensation, Net of Forfeitures     $ 1,300,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   0 235,500      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price     $ 20.06      
Performance Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     73,700      
Share-Based Compensation Arrangement, By Share-Based Payment Award, Equity Instrument Other Than Options, Percent Represented By EBITDA     25.00%      
Share-Based Compensation Aggrangement, By Share-Based Payment Award, Equity Instrument Other Than Options, Percent Represented By Relative Shareholder Return Performance     75.00%      
Officers And Key Employees [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Directors compensation expense   $ 81,000     $ 108,000  
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value     $ 1,605,186      
Audit Committee Chairman [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Director Compensation, Annual Cash Retainer $ 10,000          
Director Compensation, Quarterly Installment Of Annual Cash Retainer 2,500          
Corporate Governance Committee Chairman [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Director Compensation, Annual Cash Retainer 5,000          
Director Compensation, Quarterly Installment Of Annual Cash Retainer 1,250          
Compensation Committee Chairman [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Director Compensation, Annual Cash Retainer 5,000          
Director Compensation, Quarterly Installment Of Annual Cash Retainer 1,250          
Director [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Director Compensation, Annual Cash Retainer 75,000          
Director Compensation, Quarterly Installment Of Annual Cash Retainer 18,750          
New Director [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Director Compensation, Annual Cash Retainer $ 25,000          
Share-based Compensation Award, Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage         50.00%  
Share-based Compensation Award, Tranche Two [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage         25.00%