Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Unrealized loss on cash flow hedge, tax effect	$ 0	$ 3	$ 0	$ 6
Reclassification adjustment for cash flow hedge, tax effect	0	(28)	0	(53)
Unrealized gain on securities, tax effect	(3)	(3)	(8)	(2)
Reclassification adjustment for securities, tax effect	$ 0	$ 0