Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Fair Value Measurements [Abstract]

Financial Assets And Liabilities Subject To Fair Value Measurement Provisions

	Level 1		Level 2		Level 3		Fair Value at December 31, 2011
Money market funds	$	15,275	$	-	$	-	$	15,275
Certificates of deposit		-		3,555		-		3,555
Stock		170		-		-		170
Derivative instruments – assets		-		985		-		985
Total assets at fair value	$	15,445	$	4,540	$	-	$	19,985
	Level 1		Level 2		Level 3		Fair Value at December 31, 2011
Derivative instruments – liabilities	$	-	$	(1,801)	$	-	$	(1,801)
Total liabilities at fair value	$	-	$	(1,801)	$	-	$	(1,801)

	Level 1		Level 2		Level 3		Fair Value at December 31, 2010
Money market funds	$	121,943	$	-	$	-	$	121,943
Certificates of deposit		-		36,268		-		36,268
Stock		224		-		-		224
Derivative instruments – assets		-		887		-		887
Total assets at fair value	$	122,167	$	37,155	$	-	$	159,322
	Level 1		Level 2		Level 3		Fair Value at December 31, 2010
Derivative instruments – liabilities	$	-	$	(761)	$	-	$	(761)
Total liabilities at fair value	$	-	$	(761)	$	-	$	(761)