Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 4,342	$ 7,226
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	4,039	6,736
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	303	490
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	4,342	7,226
TOTAL Balance	(9,401)	(14,529)
TOTAL Balance	(5,059)	(7,303)
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	4,038	4,762
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	4,039	4,764
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	(1)	(2)
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	4,038	4,762
TOTAL Balance	9,053	10,278
TOTAL Balance	13,091	15,040
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	304	2,464
Change in Other comprehensive income before reclassification, Unrealized gains and Losses on available-for-sale Securities	0	1,972
Amount reclassified from accumalted other comperhensive income, unrealized gain and losses and available for sale securities	304	492
Net Current period other comprehensive other income, Unrealized gains and Losses on available-for-sale Securities	304	2,464
TOTAL Balance	(18,454)	(24,807)
TOTAL Balance	$ (18,150)	$ (22,343)