Financing Receivables - Allowance For Credit Losses Rollforward (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (6,395)	$ (6,472)
Charge-offs	1,566	944
Recoveries	0	0
Reclassifications	0	0
Provision	(1,406)	(677)
Currency adjustments	(136)	164
Ending balance	(6,371)	(6,041)
Chile
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(6,108)	(6,107)
Charge-offs	1,071	944
Recoveries	0	0
Reclassifications	0	0
Provision	(731)	(745)
Currency adjustments	(129)	162
Ending balance	(5,897)	(5,746)
Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	(287)	(365)
Charge-offs	495	0
Recoveries	0	0
Reclassifications	0	0
Provision	(675)	68
Currency adjustments	(7)	2
Ending balance	$ (474)	$ (295)