Accumulated Other Comprehensive Income (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
TOTAL Balance	$ (8,925)	$ (10,082)	$ (7,472)	$ (10,494)
Current Period Change	(10,221)	744	(11,674)	1,156
TOTAL Balance	(19,146)	(9,338)	(19,146)	(9,338)
Unrealized gains losses on securities available-for-sale without other than temporary impairment [Member]
TOTAL Balance	15,161	18,175	17,044	18,136
Current Period Change	(12,138)	11	(14,021)	251
TOTAL Balance	3,023	18,514	3,023	18,514
Unrealized gains losses on securities available-for-sale with other than temporary impairment [Member]
TOTAL Balance	(3,397)	(5,393)	(3,613)	(5,396)
Current Period Change	1,579	3	1,795	133
TOTAL Balance	(1,818)	(5,390)	(1,818)	(5,390)
Total unrealized loss on securities available-for-sale [Member]
TOTAL Balance	11,764	12,782	13,431	12,740
Current Period Change	(10,559)	14	(12,226)	384
TOTAL Balance	1,205	13,124	1,205	13,124
Unrealized loss on retirement plans [Member]
TOTAL Balance	(20,689)	(22,864)	(20,903)	(23,234)
Current Period Change	338	402	552	772
TOTAL Balance	$ (20,351)	$ (22,462)	$ (20,351)	$ (22,462)