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Operating Leases (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Rent Expense $ 825,000us-gaap_OperatingLeasesRentExpenseNet $ 866,000us-gaap_OperatingLeasesRentExpenseNet $ 826,000us-gaap_OperatingLeasesRentExpenseNet
Minimum [Member]      
Operating leases, renewal option term 1 year    
Maximum [Member]      
Operating leases, renewal option term 5 years