Consolidated Condensed Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 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)	79	33	139	104
Unrealized net holding (loss) on securities available-for-sale, Tax expense (benefit)	$ 1,511	$ (1,146)	$ 326	$ (4,578)