Note 6 - Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash, including short-term deposits1	$	53,888	$	53,888	$	-	$	-
Mutual funds2		10,135		10,135		-		-
United States government securities2		118,040		118,040		-		-
Government agencies2		2,504		2,504		-		-
Corporate securities2		4,555		4,555		-		-
Commercial paper3		35,826		-		35,826		-
Corporate oligations4		33,838		-		33,838		-
Non-controlling interests in certain funds5		1,117		-				1,117
	$	259,903	$	189,122	$	69,664	$	1,117

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash, including short-term deposits1	$	8,601	$	8,601	$	-	$	-
United States government securities2		309,780		309,780		-		-
Government agencies2		3,526		3,526		-		-
Corporate oligations2		1,521		-		1,521		-
Non-controlling interests in certain funds3		1,117		-		-		1,117
Total	$	324,545	$	321,907	$	1,521	$	1,117