FINANCIAL INSTRUMENTS AND FAIR VALUE (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Schedule of Derivative Instrument showing notional value of Interest Rate Swaps

	Three Months Ended September 30,					Nine Months Ended September 30,
	2012		2011			2012			2011
Balance, beginning of the period	$	—	$	9,333		$	7,667		$	11,000
New contracts		—		—			—			—
Matured contracts		—		(833	)		(7,667	)		(2,500	)
Balance, end of the period	$	—	$	8,500		$	—		$	8,500

Schedule of other derivatives not designated as hedging Instruments included in Financial Statements

Type	Maturity	Balance Sheet Location	September 30, 2012		December 31, 2011
Interest rate swaps	June 2012	Other current liabilities	$	—	$	57

Schedule of derivatives not designated as hedging instruments included in condensed consolidated statement of comprehensive earnings

	Three Months Ended September 30,					Nine Months Ended September 30,						Location of Loss (Gain) Recognized in Income
	2012		2011			2012			2011
Periodic settlements	$	—	$	38		$	60		$	111		Interest expense
Change in fair value	$	—	$	(38	)	$	(57	)	$	(98	)	Interest expense

Schedule of fair value measured on recurring basis

	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)		Total
September 30, 2012
Money market funds	$	137	$	—		$	—	$	137
Marketable securities		11,648		—			—		11,648
Total assets	$	11,785	$	—		$	—	$	11,785
December 31, 2011
Money market funds	$	8,483	$	—		$	—	$	8,483
Marketable securities		11,625		—			—		11,625
Total assets	$	20,108	$	—		$	—	$	20,108
Interest rate swaps liability	$	—	$	(57	)	$	—	$	(57	)