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Accumulated Other Comprehensive Income (Details 1) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other Comprehensive Income (Loss), Net of Tax, Footnote $ 10,527  
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax 10,221 $ (7,699)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax 10,527 (7,418)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 306 281
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance (12,927) (24,488)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 10,527 (7,418)
TOTAL Balance (23,454) (14,704)
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 10,221 (7,699)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax 10,224 (7,699)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 3 0
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance 4,119 (4,943)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 10,224 (4,337)
TOTAL Balance (6,105) 2,258
Unrealized gains losses on securities available-for-sale with other than temporary impairment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance 2,399 4,282
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 58 653
TOTAL Balance 2,341 3,629
Unrealized gains losses on securities available-for-sale without other than temporary impairment [Member]    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance 1,720 (9,225)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 10,166 (4,990)
TOTAL Balance (8,446) (1,371)
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 303 281
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax 303 281
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
TOTAL Balance (17,046) (19,545)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 303 (3,081)
TOTAL Balance $ (17,349) $ (16,962)