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Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Pre-Tax Amount [Member]    
Schedule Of Other Comprehesive Income [Line Items]    
Unrealized Net Holding Gain (Loss) On All Other Securitiies $ (4,412) $ (785)
Reclassification adjustment for loss (gain) on securities recognized in earnings 221 (16)
Other Comprehensive Income (Loss) (4,191) (801)
Tax Benefit (Expense) [Member]    
Schedule Of Other Comprehesive Income [Line Items]    
Unrealized Net Holding Gain (Loss) On All Other Securitiies 1,628 289
Reclassification adjustment for loss (gain) on securities recognized in earnings (82) 6
Other Comprehensive Income (Loss) 1,546 295
Net Of Tax Amount [Member]    
Schedule Of Other Comprehesive Income [Line Items]    
Unrealized Net Holding Gain (Loss) On All Other Securitiies (2,784) (496)
Reclassification adjustment for loss (gain) on securities recognized in earnings 139 (10)
Other Comprehensive Income (Loss) $ (2,645) $ (506)