Financing Receivables - Allowance For Credit Losses Rollforward (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ (9,175)	$ (10,576)
Charge-offs	2,386	1,861
Recoveries	(9)	0
Reclassifications	0	75
Provision	(951)	(525)
Currency adjustments	(155)	(177)
Ending balance	(7,904)	(9,342)
Chile
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	(6,209)	(7,240)
Charge-offs	2,033	1,805
Recoveries	0	0
Reclassifications	0	0
Provision	(1,112)	(861)
Currency adjustments	(100)	(204)
Ending balance	(5,388)	(6,500)
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	(2,966)	(3,336)
Charge-offs	353	56
Recoveries	(9)	0
Reclassifications	0	75
Provision	161	336
Currency adjustments	(55)	27
Ending balance	$ (2,516)	$ (2,842)