Consolidated Condensed Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]
Change in pension plan assets and benefit obligations, Tax effect	$ 0			$ (222)
Unrealized net holding gain on cash flow hedge, Tax expense (benefit)		77	0	216
Unrealized net holding loss on securities available-for-sale, Tax expense (benefit)	$ (5,931)	$ 464	$ (18,270)	$ 790