CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2012

Dec. 31, 2011

CASH, CASH EQUIVALENTS AND INVESTMENTS [Abstract]

Investments

Investments at March 31, 2012 consisted of the following (in thousands):

	Amortized		Unrealized					Aggregate Fair
Investment Classification	Cost		Gains		(Losses)			Market Value
March 31, 2012 -
Certificates of deposit	$	6,612	$	-	$	(7	)	$	6,605
Commercial paper		2,993		1		-			2,994
Corporate bonds		182,575		24		(109	)		182,490
U.S. government bonds		3,213		-		-			3,213
	$	195,393	$	25	$	(116	)	$	195,302

Investments at December 31, 2011 consisted of the following (in thousands):

	Amortized		Unrealized					Aggregate Fair
Investment Classification	Cost		Gains		(Losses)			Market Value
December 31, 2011 -
Certificates of deposit	$	5,797	$	-	$	(5	)	$	5,792
Corporate bonds		223,260		43		(25	)		223,278
U.S. government bonds		5,224		-		-			5,224
	$	234,281	$	43	$	(30	)	$	234,294

All short-term investments held at March 31, 2012 will mature within one year. All long-term investments held at March 31, 2012 will mature in more than one year.