Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 3,371	$ 4,342
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	3,189	4,039
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	182	303
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	3,371	4,342
TOTAL Balance	(14,164)	(9,401)
TOTAL Balance	(10,793)	(5,059)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	3,188	4,038
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	3,189	4,039
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	(1)	(1)
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	3,188	4,038
TOTAL Balance	(1,077)	9,053
TOTAL Balance	2,111	13,091
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	183	304
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	0	0
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	183	304
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	183	304
TOTAL Balance	(13,087)	(18,454)
TOTAL Balance	$ (12,904)	$ (18,150)