Financing Receivables - Summary of Aging of Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Total past due (on non-accrual status)	$ 13,485	$ 11,333
Not past due	19,641	5,198
Total financing receivables	33,126	16,531
Chile
Financing Receivable, Past Due [Line Items]
Total past due (on non-accrual status)	12,836	10,497
Not past due	17,895	4,980
Total financing receivables	30,731	15,477
Other
Financing Receivable, Past Due [Line Items]
Total past due (on non-accrual status)	649	836
Not past due	1,746	218
Total financing receivables	2,395	1,054
Amounts past due less than one year
Financing Receivable, Past Due [Line Items]
Amount past due	10,307	8,262
Amounts past due less than one year | Chile
Financing Receivable, Past Due [Line Items]
Amount past due	9,798	7,618
Amounts past due less than one year | Other
Financing Receivable, Past Due [Line Items]
Amount past due	509	644
Amounts past due one year or greater
Financing Receivable, Past Due [Line Items]
Amount past due	3,178	3,071
Amounts past due one year or greater | Chile
Financing Receivable, Past Due [Line Items]
Amount past due	3,038	2,879
Amounts past due one year or greater | Other
Financing Receivable, Past Due [Line Items]
Amount past due	$ 140	$ 192