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Leases (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Leases [Abstract]      
Remaining term of operating leases (in years) 6 years    
Total rental expense under operating leases $ 4,600,000 $ 4,800,000 $ 5,400,000
Minimum future operating lease payments [Abstract]      
2014 907,000    
2015 730,000    
2016 540,000    
2017 402,000    
2018 and thereafter 569,000    
Total $ 3,148,000