Accumulated Other Comprehensive Income (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
TOTAL Balance	$ (19,146)	$ (9,338)	$ (7,472)	$ (10,494)
Current Period Change	(1,982)	2,261	(13,656)	3,417
TOTAL Balance	(21,128)	(7,077)	(21,128)	(7,077)
Unrealized gains losses on securities available-for-sale without other than temporary impairment [Member]
TOTAL Balance	3,023	18,514	17,044	18,136
Current Period Change	(2,250)	1,290	(16,271)	1,668
TOTAL Balance	773	19,804	773	19,804
Unrealized gains losses on securities available-for-sale with other than temporary impairment [Member]
TOTAL Balance	(1,818)	(5,390)	(3,613)	(5,396)
Current Period Change	(72)	584	1,723	590
TOTAL Balance	(1,890)	(4,806)	(1,890)	(4,806)
Total unrealized loss on securities available-for-sale [Member]
TOTAL Balance	1,205	13,124	13,431	12,740
Current Period Change	(2,322)	1,874	(14,548)	2,258
TOTAL Balance	(1,117)	14,998	(1,117)	14,998
Unrealized loss on retirement plans [Member]
TOTAL Balance	(20,351)	(22,462)	(20,903)	(23,234)
Current Period Change	340	387	892	1,159
TOTAL Balance	$ (20,011)	$ (22,075)	$ (20,011)	$ (22,075)