Consolidated Statements of Comprehensive Income (Unaudited) (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
Tax expense (benefit) on net unrealized gains (losses) on investment securities available-for-sale	$ (615)	$ (392)	$ 1,150	$ (2,879)
Tax expense (benefit) on reclassification adjustment for realized gains on sale of investment securities available-for-sale	0	0	0	(300)
Tax expense (benefit) on adjustment for pension and other postretirement benefits	$ (201)	$ 332	$ (604)	$ 996