Financing Receivables - Allowance For Credit Losses Rollforward (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ (9,175)	$ (10,576)
Charge-offs	3,128	3,629
Recoveries	(36)	(46)
Reclassifications	69	0
Provision	(1,996)	(1,971)
Currency adjustments	(279)	(290)
Ending balance	(8,289)	(9,254)
Chile
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	(6,209)	(7,240)
Charge-offs	2,798	3,525
Recoveries	0	0
Reclassifications	0	0
Provision	(2,089)	(2,152)
Currency adjustments	(360)	(387)
Ending balance	(5,860)	(6,254)
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	(2,966)	(3,336)
Charge-offs	330	104
Recoveries	(36)	(46)
Reclassifications	69	0
Provision	93	181
Currency adjustments	81	97
Ending balance	$ (2,429)	$ (3,000)