Financing Receivables - Summary of Aging of Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	$ 17,434	$ 14,926
Not past due	19,067	14,850
Total financing receivables	36,501	29,776
Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	15,167	12,610
Not past due	16,564	11,758
Total financing receivables	31,731	24,368
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	2,267	2,316
Not past due	2,503	3,092
Total financing receivables	4,770	5,408
Financing Receivables, Less Than One Year Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	12,160	9,545
Financing Receivables, Less Than One Year Past Due | Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	11,317	8,711
Financing Receivables, Less Than One Year Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	843	834
Financing Receivables, More Than One Year Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	5,274	5,381
Financing Receivables, More Than One Year Past Due | Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	3,850	3,899
Financing Receivables, More Than One Year Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	$ 1,424	$ 1,482