Consolidated Condensed Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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)		79	0	139
Unrealized net holding loss on securities available-for-sale, Tax expense (benefit)	$ (11,058)	$ 1,511	$ (12,340)	$ 326