Consolidated Statements of Income and Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Change in net unrealized gain/loss on securities available for sale, tax	$ 292	$ 1,770	$ 3,696	$ 4,152
Change in the non-credit portion of OTTI losses recognized in other comprehensive income, tax	110	10	132	4,795
Change in pension and post-retirement obligations, tax	357	1,008	1,070	3,024
Reclassification adjustment for sales of available for sale securities, tax	$ 73	$ 405	$ 2,146	$ 2,503