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Stock Compensation Plans (Details Textual) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 96,820   173,720
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options $ 157,000    
Employee Service Share Based Compensation Nonvested Awards, Total Compensation Cost Not Yet Recognized, Period For Recognition (in years) 4 years 22 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 7,927    
Allocated Share-based Compensation Expense $ 477,000 $ 130,000  
Compensation Expense, Maximum 3,600,000    
Estimated Compensation Expense, Excepted 1,800,000    
Unrecognized Compensation Expense $ 967,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 13.13 $ 11.25  
Short-term Equity Incentive Plan 2013 [Member]      
Option Subscription, Description The final amount of benefits under the 2014 STIP were determined as of December 31, 2014 and paid out in cash in the first quarter of 2015.    
Equity Plan 2010 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 350,000    
Long-term Equity Incentive Plan 2014 [Member]      
Option Subscription, Description The amount of benefit under the 2014 LTIP will be determined individually at the end of the 36 month performance period ending December 31, 2016. The awards will vest at the end of the performance period ending December 31, 2016. The benefits earned under the 2014 LTIP will be paid out in equity in the first quarter of 2017. The participants are required to be employed on the day of payout in order to receive such payment.    
Restricted Stock Units (Rsus) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 24,757   30,538
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 74,545   91,812
Restricted Stock Units (Rsus) [Member] | Director [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 2,160    
Short-term and Long-term Equity Incentive Plan 2011 [Member]      
Allocated Share-based Compensation Expense $ 193,000    
Stock Option Grant, 2009 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Vested Percentage, Year 20.00%    
Stock Option Grant, 2011 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Vested Percentage, Year 40.00%    
Stock Option Grant, Annual [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Vested Percentage, Year 20.00%    
Short Term Equity Incentive Plan 2014 [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 45.00%    
Short Term Equity Incentive Plan 2014 [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 30.00%    
Long Term Equity Incentive Plan 2014 [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 45.00%    
Long Term Equity Incentive Plan 2014 [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 20.00%    
Long Term Equity Incentive Plan 2015 [Member]      
Option Subscription, Description The amount of benefit under the 2015 LTIP will be determined individually at the end of the 36 month performance period ending December 31, 2017. The awards will vest at the end of the performance period ending December 31, 2017. The benefits earned under the 2015 LTIP will be paid out in equity in the first quarter of 2018. The participants are required to be employed on the day of payout in order to receive such payment.    
Long Term Equity Incentive Plan 2015 [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 45.00%    
Long Term Equity Incentive Plan 2015 [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 20.00%    
Short Term Equity Incentive Plan 2015 [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 45.00%    
Short Term Equity Incentive Plan 2015 [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 30.00%