INVESTMENTS (TABLES)

12 Months Ended

Dec. 31, 2011

Notes To Consolidated Financial Statement Abstract

Schedule Of Available For Sale Securities Reconciliation Table Text Block

		DECEMBER 31, 2011
								Other-Than
				Gross		Gross		Temporary
				Unrealized		Unrealized		Impairment		Fair
		Cost		Gains		Losses		Losses		Value
Corporate notes and bonds		$	138,554	$	161	$	(549)	$	-	$	138,166
Federal agency notes and bonds			125,092		221		(24)		-		125,289
Auction rate floating securities			17,400		-		(4,607)		-		12,793
Asset-backed securities			9,527		-		(8)		-		9,519
	Total securities	$	290,573	$	382	$	(5,188)	$	-	$	285,767
		DECEMBER 31, 2010
								Other-Than
				Gross		Gross		Temporary
				Unrealized		Unrealized		Impairment		Fair
		Cost		Gains		Losses		Losses		Value
Corporate notes and bonds		$	145,758	$	454	$	(48)	$	-	$	146,164
Federal agency notes and bonds			328,262		953		(88)		-		329,127
Auction rate floating securities			28,575		-		(7,095)		-		21,480
Asset-backed securities			9,896		6		(1)		-		9,901
	Total securities	$	512,491	$	1,413	$	(7,232)	$	-	$	506,672

Investments Classified By Contractual Maturity Date Table Text Block

		DECEMBER 31, 2011
				Estimated
		Cost		Fair Value
Available-for-sale
	Due in one year or less	$	98,334	$	98,374
	Due after one year through five years		174,839		174,600
	Due after 10 years		17,400		12,793
		$	290,573	$	285,767

Schedule Of Unrealized Loss On Investments Table Text Block

		Less Than 12 Months				Greater Than 12 Months
				Gross				Gross
		Fair		Unrealized		Fair		Unrealized
		Value		Loss		Value		Loss
Corporate notes and bonds		$	80,470	$	549	$	-	$	-
Federal agency notes and bonds			44,344		24		-		-
Auction rate floating securities			-		-		12,793		4,607
Asset-backed securities			9,519		8		-		-
	Total securities	$	134,333	$	581	$	12,793	$	4,607