Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Non-Financial Assets and Liabilities Measured at Fair Value) (Details)

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FAIR VALUE MEASUREMENTS (Non-Financial Assets and Liabilities Measured at Fair Value) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Era do Brazil [Member] | Level 1 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity Method Investments, Fair Value Disclosure $ 0 [1] $ 0 [1]
Era do Brazil [Member] | Level 2 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity Method Investments, Fair Value Disclosure 248 [1] 248 [1]
Era do Brazil [Member] | Level 3 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity Method Investments, Fair Value Disclosure 0 [1] 0 [1]
Aeroleo [Member] | Level 1 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity Method Investments, Fair Value Disclosure   0 [2]
Aeroleo [Member] | Level 2 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity Method Investments, Fair Value Disclosure   0 [2]
Aeroleo [Member] | Level 3 [Member]
    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity Method Investments, Fair Value Disclosure   $ 0 [2]
[1] On September 30, 2012, the Company marked its equity investment in its Era do Brazil joint venture to fair value. As the primary beneficiary, the Company has consolidated Era do Brazil in its financial statements effective September 30, 2012 (see Note 5).
[2] On March 1, 2012, the Company wrote-off its equity investment in its Aeróleo joint venture (see Note 5).