Financing Receivables - Summary of Aging of Financing Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	$ 11,333	$ 11,473
Not past due	5,198	8,907
Total financing receivables	16,531	20,380
Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	10,497	10,351
Not past due	4,980	8,494
Total financing receivables	15,477	18,845
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	836	1,122
Not past due	218	413
Total financing receivables	1,054	1,535
Financing Receivables, Less Than One Year Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	8,262	7,721
Financing Receivables, Less Than One Year Past Due | Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	7,618	6,800
Financing Receivables, Less Than One Year Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	644	921
Financing Receivables, More Than One Year Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	3,071	3,752
Financing Receivables, More Than One Year Past Due | Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	2,879	3,551
Financing Receivables, More Than One Year Past Due | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	$ 192	$ 201