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Equity Compensation Plans - Options (Details) - USD ($)
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Equity Compensation Plans    
Total compensation cost $ 466,000  
2014 Plan    
Equity Compensation Plans    
Number of shares authorized 375,000  
Number of shares issuable 125,000  
Stock options    
Equity Compensation Plans    
Granted (in shares) 0 0
Term of stock options granted 10 years  
Exercised (in shares) 0 0
Total unrecognized compensation cost $ 0  
Shares    
Beginning outstanding (in shares) 229,000  
Ending outstanding (in shares) 229,000  
Exercisable at end of period (in shares) 229,000  
Weighted Average Exercise Price    
Beginning outstanding (in dollars per share) $ 28.28  
Ending outstanding (in dollars per share) 28.28  
Exercisable at end of period (in dollars per share) $ 28.28  
Weighted Average Remaining Contractual Term (years)    
Ending outstanding (in years) 1 year 4 months 24 days  
Exercisable at end of period 1 year 4 months 24 days