Accumulated Other Comprehensive Income (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax	$ (33)	$ 786	$ 8,211	$ 6,094
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	133	1,081	8,733	6,989
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	166	295	522	895
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	(5,431)	(2,412)	(5,431)	(2,412)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	133	1,081	8,733	6,989
TOTAL Balance	(5,564)	(3,493)	(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	(33)	786	8,211	6,094
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(51)	777	8,182	6,077
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(18)	(9)	(29)	(17)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	7,105	15,130	7,105	15,130
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(51)	777	8,182	6,077
TOTAL Balance	7,156	14,353	(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	2,969	1,347	2,969	1,347
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	942	114	1,028	(1,623)
TOTAL Balance	2,027	1,233	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	4,136	13,783	4,136	13,783
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(993)	663	7,154	7,700
TOTAL Balance	5,129	13,120	(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	0	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	184	304	551	912
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	184	304	551	912
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	(12,536)	(17,542)	(12,536)	(17,542)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	184	304	551	912
TOTAL Balance	$ (12,720)	$ (17,846)	$ (13,087)	$ (18,454)