Financing Receivables - Summary of Aging of Financing Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Total past due (on non-accrual status)	$ 14,250	$ 11,333
Not past due	21,967	5,198
Total financing receivables	36,217	16,531
Chile
Financing Receivable, Past Due [Line Items]
Total past due (on non-accrual status)	13,024	10,497
Not past due	20,588	4,980
Total financing receivables	33,612	15,477
Other
Financing Receivable, Past Due [Line Items]
Total past due (on non-accrual status)	1,226	836
Not past due	1,379	218
Total financing receivables	2,605	1,054
Amounts past due less than one year
Financing Receivable, Past Due [Line Items]
Amount past due	10,967	8,262
Amounts past due less than one year | Chile
Financing Receivable, Past Due [Line Items]
Amount past due	9,881	7,618
Amounts past due less than one year | Other
Financing Receivable, Past Due [Line Items]
Amount past due	1,086	644
Amounts past due one year or greater
Financing Receivable, Past Due [Line Items]
Amount past due	3,283	3,071
Amounts past due one year or greater | Chile
Financing Receivable, Past Due [Line Items]
Amount past due	3,143	2,879
Amounts past due one year or greater | Other
Financing Receivable, Past Due [Line Items]
Amount past due	$ 140	$ 192