FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2011

FAIR VALUE MEASUREMENTS

Fair value of assets measured on a recurring basis

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at June 30, 2011
Auction rate securities	$	—	$	—	$	5,311	$	5,311
Marketable securities	$	128	$	—	$	—	$	128

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at December 31, 2010
Auction rate securities	$	—	$	—	$	5,437	$	5,437
Marketable securities	$	3,174	$	—	$	—	$	3,174

Changes in auction rate securities measured at fair value on a recurring basis

	Three Months Ended June 30,
	2011			2010
Balance at April 1,	$	5,379		$	6,503
Sale of auction rate securities	—			(1,300		)
Unrealized (losses) gains included in other comprehensive income	(68		)	112
Balance at June 30,	$	5,311		$	5,315

	Six Months Ended June 30,
	2011			2010
Balance at January 1,	$	5,437		$	6,503
Sale of auction rate securities	—			(1,300		)
Unrealized (losses) gains included in other comprehensive income	(126		)	112
Balance at June 30,	$	5,311		$	5,315