Annual report pursuant to Section 13 and 15(d)

VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Era do Brazil Narrative (Details)

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VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Era do Brazil Narrative (Details)
$ in Thousands
 12 Months Ended
Jul. 01, 2011
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
note_receivable
Oct. 01, 2015
Schedule of Equity Method Investments [Line Items]            
Investments in and advances to equity investees   $ 36 $ 125 $ 0    
Equity Method Investee | Era do Brazil            
Schedule of Equity Method Investments [Line Items]            
Notes receivable to related party         $ 9,200  
Number of notes receivable to related parties | note_receivable         2  
Era do Brazil            
Schedule of Equity Method Investments [Line Items]            
Investments in and advances to equity investees $ 4,800          
Cash from sale of leased equipment 9,500          
Proceeds from related party debt         $ 1,600  
Era do Brazil | Equity Method Investee            
Schedule of Equity Method Investments [Line Items]            
Consideration received 11,500          
Notes receivable to related party $ 2,000       $ 10,800  
Number of notes receivable to related parties | note_receivable         2  
Era do Brazil            
Schedule of Equity Method Investments [Line Items]            
Remaining ownership percentage acquired           50.00%
Era do Brazil | Variable Interest Entity, Primary Beneficiary            
Schedule of Equity Method Investments [Line Items]            
Remaining ownership percentage acquired           50.00%