Office Properties and Equipment (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Office properties and equipment [Abstract]      
Office properties and equipment, gross $ 49,273,000 $ 48,835,000  
Less accumulated depreciation (22,183,000) (21,900,000)  
Office properties and equipment, net 27,090,000 26,935,000  
Depreciation of premises and equipment 2,717,000 2,081,000 1,842,000
Rent expense totaled 3,300,000 2,800,000 2,600,000
Minimum annual commitments under all non-cancelable lease agreements [Abstract]      
Within one year 2,696,000    
One to two years 1,558,000    
Two to three years 1,295,000    
Three to four years 1,009,000    
Four through five years 844,000    
After five years 4,025,000    
Total 11,427,000    
Land [Member]
     
Office properties and equipment [Abstract]      
Office properties and equipment, gross 6,444,000 6,836,000  
Office buildings and improvements [Member]
     
Office properties and equipment [Abstract]      
Office properties and equipment, gross 27,634,000 29,652,000  
Furniture and equipment [Member]
     
Office properties and equipment [Abstract]      
Office properties and equipment, gross $ 15,195,000 $ 12,347,000