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Stock Compensation (Details) (USD $)
0 Months Ended 12 Months Ended
Jul. 02, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Stock compensation          
Grant of options to purchase (in shares)   547,492      
Options issued in 2008 to acquire shares that vested immediately   11,578      
Number of shares          
Outstanding, beginning of year (in shares)   223,951 286,977 287,186  
Expired (in shares)   (102,546) (63,026) (209)  
Outstanding, end of year (in shares)   121,405 223,951 286,977 287,186
Exercisable, end of year (in shares)   106,888 205,616 258,206  
Weighted average exercise price          
Outstanding, beginning of year (in dollars per share)   $ 23.74 $ 22.46 $ 22.46  
Expired (in dollars per share)   $ 23.26 $ 17.94 $ 17.27  
Outstanding, end of year (in dollars per share)   $ 24.14 $ 23.74 $ 22.46 $ 22.46
Exercisable, end of year (in dollars per share)   $ 24.43 $ 23.81 $ 22.53  
Additional disclosures          
Stock dividend (as a percent) 4.00%        
Weighted average remaining contractual life of options outstanding   2 years 6 months 3 years    
Intrinsic value of options outstanding   $ 0 $ 0    
Weighted average remaining contractual life of options exercisable   2 years 3 months 18 days 2 years 9 months 18 days    
Intrinsic value of options exercisable   0 0    
Stock based compensation expense   19,000   29,000 58,000
Total unrecognized compensation expense related to non-vested stock awards   $ 50,000      
Weighted average period is expected to be recognized   1 year 8 months 12 days      
Minimum
         
Stock compensation          
Options vest over periods   4 years      
Maximum
         
Stock compensation          
Options vest over periods   5 years