FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2011

FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES

Schedule of financial assets recorded at fair value on a recurring basis

September 30, 2011	Level 1		Level 2		Level 3		Total
Cash	$	105,046	$	-	$	-	$	105,046
Money market funds		142,426		-		-		142,426
U.S. Treasuries		46,140		-		-		46,140
Certificates of deposit		-		68,685		-		68,685
Corporate bonds		-		2,021		-		2,021
Municipal securities		-		209,583		-		209,583
U.S. government agency securities		-		46,013		-		46,013
Variable rate demand notes		-		66,811		-		66,811
Auction rate securities		-		-		39,376		39,376
Put options related to auction rate securities		-		-		3,177		3,177
Total	$	293,612	$	393,113	$	42,553	$	729,278
Amounts included in:
Cash and cash equivalents	$	247,472	$	39,685	$	-	$	287,157
Short-term investments		46,140		353,428		12,687		412,255
Investments		-		-		26,689		26,689
Prepaid expenses and other current assets		-		-		852		852
Other assets		-		-		2,325		2,325
Total	$	293,612	$	393,113	$	42,553	$	729,278

December 31, 2010	Level 1		Level 2		Level 3		Total
Cash	$	50,202	$	-	$	-	$	50,202
Money market funds		242,001		-		-		242,001
U.S. Treasuries		85,521		-		-		85,521
Certificates of deposit		-		40,010		-		40,010
Municipal securities		-		81,899		-		81,899
U.S. government agency securities		-		19,688		-		19,688
Variable rate demand notes		-		56,107		-		56,107
Auction rate securities		-		-		68,252		68,252
Put option related to auction rate securities		-		-		3,768		3,768
Total	$	377,724	$	197,704	$	72,020	$	647,448
Amounts included in:
Cash and cash equivalents	$	311,202	$	43,640	$	-	$	354,842
Short-term investments		66,522		154,064		24,063		244,649
Investments		-		-		44,189		44,189
Prepaid expenses and other current assets		-		-		2,983		2,983
Other assets		-		-		785		785
Total	$	377,724	$	197,704	$	72,020	$	647,448

Summary of changes in fair value of the Company's Level 3 financial assets:

	Three-Months Ended September 30, 2011						Three-Months Ended September 30, 2010
	Auction Rate Securities			Put Options			Auction Rate Securities			Put Options
Beginning Balance	$	55,636		$	4,091		$	76,166		$	4,100
Transfers to Level 3	-			-			-			-
Recognized gain (loss) included in income	115			(914		)	(410		)	(315)
Unrealized gain included in other comprehensive income	-			-			299			-
Settlements	(16,375		)	-			(5,850		)	-
Ending Balance	$	39,376		$	3,177		$	70,205		$	3,785

	Nine-Months Ended September 30, 2011							Nine-Months Ended September 30, 2010
	Auction Rate Securities			Put Options				Auction Rate Securities			Put Options
Beginning Balance	$	68,252		$		3,768		$	84,325		$	-
Transfers to Level 3	-			-				-			-
Recognized (loss) gain included in income	(259		)	(591			)	(4,647		)	3,785
Unrealized gain included in other comprehensive income	2,408			-				5,477			-
Settlements	(31,025		)	-				(14,950		)	-
Ending Balance	$	39,376		$	3,177			$	70,205		$	3,785