FINANCIAL INSTRUMENTS - Assets liabilities measured at fair value on recurring basis (Detail 5) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets	$ 11,796	$ 20,108
Fair Value, Measurements, Recurring | Money market funds
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets	477	8,483
Fair Value, Measurements, Recurring | Marketable securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets	11,319	11,625
Fair Value, Measurements, Recurring | Interest rate swaps liability
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest rate swaps liability		(57)
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets	11,796	20,108
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1) | Money market funds
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets	477	8,483
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1) | Marketable securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets	11,319	11,625
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets (Level 1) | Interest rate swaps liability
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest rate swaps liability
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Money market funds
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Marketable securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swaps liability
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest rate swaps liability		(57)
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Money market funds
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Marketable securities
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total assets
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Interest rate swaps liability
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Interest rate swaps liability