Consolidated Condensed Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Change in pension plan assets and benefit obligations, Tax effect	$ 0	$ 0	$ 222
Unrealized net holding gain (loss) on cash flow hedge, Tax expense (benefit)	77	83	216	187
Unrealized net holding (loss) on securities available-for-sale, Tax expense (benefit)	$ 464	$ 4,923	$ 790	$ 345