Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Tax expense (benefit) on net unrealized gains (losses) on investment securities available-for-sale	$ (1,084)	$ 909	$ 177	$ 1,766
Tax expense (benefit) on reclassification adjustment for realized gains on sale of investment securities available-for-sale	(10)	0	(212)	0
Tax expense (benefit) on adjustment for pension and other postretirement benefits	$ 380	$ (202)	$ 761	$ (403)