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Long-Term Debt (Summary Of Long-Term Debt By Contractual Maturity And With Callable Features) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Total Principal    
Total Principal due in two fiscal years $ 52,500 $ 11,000
Total Principal due in three fiscal years 12,000 52,500
Total Principal due in four fiscal years 50,000 12,000
Total Principal due in five fiscal years 20,000 50,000
Total Principal due after five fiscal years 1,382 3,000
Total long-term debt $ 135,882 $ 128,500
Rate    
Interest rate of principal due in two fiscal years 2.21% 1.60%
Interest rate of principal due in three fiscal years 1.65% 2.21%
Interest rate of principal due in four fiscal years 1.94% 1.65%
Interest rate of principal due in five fiscal years 1.83% 1.94%
Interest rate of principal due after five fiscal years 2.27% 2.44%
Interest rate of principal 2.01% 2.01%
Callable Federal Home Loan Bank Advances [Member]    
Total Principal    
Total Principal due in two fiscal years $ 15,000  
Total Principal due in three fiscal years 2,000 $ 15,000
Total Principal due in four fiscal years   2,000
Total long-term debt $ 17,000 $ 17,000
Rate    
Interest rate of principal due in two fiscal years 4.19%  
Interest rate of principal due in three fiscal years 2.25% 4.19%
Interest rate of principal due in four fiscal years   2.25%
Interest rate of principal 3.96% 3.96%
Minimum [Member]    
Rate    
Interest rate of principal due in two fiscal years 0.99% 1.17%
Interest rate of principal due in three fiscal years 1.15% 0.99%
Interest rate of principal due in four fiscal years 1.66% 1.15%
Interest rate of principal due in five fiscal years 1.60% 1.66%
Interest rate of principal due after five fiscal years 1.85% 2.43%
Minimum [Member] | Callable Federal Home Loan Bank Advances [Member]    
Rate    
Interest rate of principal due in two fiscal years 3.69%  
Interest rate of principal due in three fiscal years 2.25% 3.69%
Interest rate of principal due in four fiscal years   2.25%
Maximum [Member]    
Rate    
Interest rate of principal due in two fiscal years 4.50% 2.29%
Interest rate of principal due in three fiscal years 2.25% 4.50%
Interest rate of principal due in four fiscal years 2.15% 2.25%
Interest rate of principal due in five fiscal years 2.45% 2.15%
Interest rate of principal due after five fiscal years 2.43% 2.45%
Maximum [Member] | Callable Federal Home Loan Bank Advances [Member]    
Rate    
Interest rate of principal due in two fiscal years 4.50%  
Interest rate of principal due in three fiscal years 2.25% 4.50%
Interest rate of principal due in four fiscal years   2.25%