Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Unrealized gain (loss) on investments, tax expense (benefit)	$ 165	$ (68)	$ (64)
Unrealized gain (loss), tax expense (benefit)	1,555	(921)	(398)
Reclassification adjustment for (gains) losses included in net income, tax (expense) benefit	$ (679)	$ (1,623)	$ 1,941