Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Unrealized loss on cash flow hedge, tax effect	$ 0	$ 0	$ 0	$ 6
Reclassification adjustment for cash flow hedge, tax effect	0	(18)	0	(71)
Unrealized gain on securities, tax effect	0	1	(8)	(1)
Reclassification adjustment for securities, tax effect	$ 8	$ 1	$ 8	$ 1