Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Other Comprehensive Income [Abstract]
Tax (provision)/benefit of unrealized derivatives gain (loss)	$ 0	$ (6)	$ (53)
Tax (provision)/benefit of foreign currency translation gain (loss)	(1,177)	(1,426)	626
Tax (provision)/benefit of marketable securities unrealized gain (loss)	$ 136	$ (570)	$ (266)