Annual report pursuant to Section 13 and 15(d)

INVESTMENTS, AT EQUITY, ADVANCES TO 50% OR LESS OWNED COMPANIES Lake Palma Narrative (Details)

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INVESTMENTS, AT EQUITY, ADVANCES TO 50% OR LESS OWNED COMPANIES Lake Palma Narrative (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]      
Advances from equity method investment $ 0 $ (16) $ 1,236
Lake Palma [Member]
      
Schedule of Equity Method Investments [Line Items]      
Number of Helicopters Operated 7    
Advances from equity method investment $ 0 $ 1,200