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Accumulated Other Comprehensive Income (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax $ 3,189 $ 4,039
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax 3,371 4,342
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 182 303
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance (10,793) (5,059)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 3,371 4,342
TOTAL Balance (14,164) (9,401)
Accumulated Net Unrealized Investment Gain (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax 3,189 4,039
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax 3,188 4,038
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax (1) (1)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance 2,111 13,091
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 3,188 4,038
TOTAL Balance (1,077) 9,053
Unrealized gains losses on securities available-for-sale with other than temporary impairment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance 1,785 2,211
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (156) (759)
TOTAL Balance 1,941 2,970
Unrealized gains losses on securities available-for-sale without other than temporary impairment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance 326 10,880
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 3,344 4,797
TOTAL Balance (3,018) 6,083
Accumulated Defined Benefit Plans Adjustment [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax 0 0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax 183 304
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 183 304
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance (12,904) (18,150)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 183 304
TOTAL Balance $ (13,087) $ (18,454)