Accumulated Other Comprehensive Income (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Reclassification Adjustments, Net of Tax	$ 6,736	$ 5,303
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	7,226	5,418
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	490	115
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	(7,303)	(8,551)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	7,226	5,418
TOTAL Balance	(14,529)	(13,969)
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	4,764	5,303
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	4,762	5,303
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(2)	0
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	15,040	1,668
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,762	5,303
TOTAL Balance	10,278	(3,635)
Unrealized gains losses on securities available-for-sale with other than temporary impairment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	3,592	1,157
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	478	2,293
TOTAL Balance	3,114	(1,136)
Unrealized gains losses on securities available-for-sale without other than temporary impairment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	11,448	511
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,284	3,010
TOTAL Balance	7,164	(2,499)
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	1,972	0
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	2,464	115
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	492	115
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
TOTAL Balance	(22,343)	(10,219)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	2,464	115
TOTAL Balance	$ (24,807)	$ (10,334)