Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Reclassifications for unrealized net gains on available-for-sale securities	$ (617)	$ (91)	$ (6,270)	$ (3,111)
Reclassification adjustment for employee benefit costs included in expense	1,915	1,085	4,400	3,460
Reclassifications adjustments - tax	$ (455)	$ (348)	$ 654	$ (124)