Consolidated Statements of Income and Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Reclassifications for net unrealized gains on available-for-sale securities	$ 2,320	$ 1,825	$ 4,666	$ 4,715
Reclassification adjustment for employee benefit costs included in expense	1,371	1,867	4,113	5,601
Reclassifications adjustments - tax	$ 332	$ (15)	$ 194	$ (310)