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Accounts Receivable, Notes Receivable, Allowance for Doubtful Accounts and Bad Debt - Concentration Risk (Details) - Geographic Concentration Risk - Notes Receivable | 12 Months Ended
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Dec. 31, 2015
Mexico |
Concentration Risk [Line Items] |
Concentration risk percentage | 19.00%
Peru |
Concentration Risk [Line Items] |
Concentration risk percentage | 16.00%
Australia |
Concentration Risk [Line Items] |
Concentration risk percentage | 9.00%
Columbia |
Concentration Risk [Line Items] |
Concentration risk percentage | 7.00%
Argentina |
Concentration Risk [Line Items] |
Concentration risk percentage | 5.00%
Other |
Concentration Risk [Line Items] |
Concentration risk percentage | 18.00%
International |
Concentration Risk [Line Items] |
Concentration risk percentage | 74.00%

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