Accumulated Other Comprehensive Income (Schedule Of Components Of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Foreign currency translation adjustment	$ 485	$ 1,063
Total accumulated other comprehensive income	(542)	2,333
Pre Tax [Member]
Unrealized gain on marketable securities	67	70
Unrealized (loss) gain on derivative financial instruments	(1,754)	2,003
Tax Portion [Member]
Unrealized gain on marketable securities	(27)	(27)
Unrealized (loss) gain on derivative financial instruments	687	(776)
Net Of Tax [Member]
Unrealized gain on marketable securities	40	43
Unrealized (loss) gain on derivative financial instruments	$ (1,067)	$ 1,227