Financing Receivables - Summary of Aging of Financing Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	$ 14,320	$ 11,333
Not past due	11,496	5,198
Total financing receivables	25,816	16,531
Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	13,734	10,497
Not past due	10,202	4,980
Total financing receivables	23,936	15,477
Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due (on non-accrual status)	586	836
Not past due	1,294	218
Total financing receivables	1,880	1,054
Amounts past due less than one year
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	11,161	8,262
Amounts past due less than one year | Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	10,728	7,618
Amounts past due less than one year | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	433	644
Amounts past due one year or greater
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	3,159	3,071
Amounts past due one year or greater | Chile
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	3,006	2,879
Amounts past due one year or greater | Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amount past due	$ 153	$ 192