Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ (3,325)	$ 505	$ 10
Tax expense (benefit) on net unrealized gains (losses) on investment securities available-for-sale	311	0	0
Tax expense on adjustment for pension and other postretirement benefits	$ (9,344)	$ 3,623	$ 6,051