FINANCIAL INSTRUMENTS AND FAIR VALUE (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of derivative instrument showing notional value of interest rate swaps

	Three Months Ended June 30,					Six Months Ended June 30,
	2013		2012			2013		2012
Balance, beginning of the period	$	—	$	6,833		$	—	$	7,667
New contracts		—		—			—		—
Matured contracts		—		(6,833	)		—		(7,667	)
Balance, end of the period	$	—	$	—		$	—	$	—

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

	Three Months Ended June 30,					Six Months Ended June 30,					Location of Loss (Gain)
	2013		2012			2013		2012			Recognized in Income
Periodic settlements	$	—	$	29		$	—	$	60			Interest expense
Change in fair value	$	—	$	(29	)	$	—	$	(57	)		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
June 30, 2013
Money market funds	$	472	$	—	$	—	$	472
Marketable securities		20,319		—		—		20,319
Total assets	$	20,791	$	—	$	—	$	20,791
December 31, 2012
Money market funds	$	477	$	—	$	—	$	477
Marketable securities		11,319		—		—		11,319
Total assets	$	11,796	$	—	$	—	$	11,796