Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Tax expense (benefit) on net unrealized gains (losses) on investment securities available-for-sale	$ 908	$ (2,714)	$ 1,765	$ (2,487)
Tax expense (benefit) on reclassification adjustment for realized gains on sale of investment securities available-for-sale	0	(4)	0	(300)
Tax expense (benefit) on adjustment for pension and other postretirement benefits	$ (202)	$ 332	$ (403)	$ 664