Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Consolidated Statements Of Comprehensive Income [Abstract]
Income taxes arising from net unrealized holding gain on investments	$ 11	$ (120)	$ 14	$ (90)
Income tax benefit arising from reclassification adjustment for loss reported in net income			30
Pre-tax loss of reclassification adjustment for loss reported in net income			$ 87