Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Goodwill [Line Items]
Fair Value Inputs, Basis Spread on Discount Rate (measured in bps)			70
Goodwill [Roll Forward]
Goodwill			$ 178,987
Accumulated impairment Losses			(14,875)
Goodwill, net beginning balance			164,112
Goodwill impairment	$ (79,700)	$ 0	(79,700)	$ 0
Goodwill, ending balance	178,987		178,987
Accumulated impairment Losses	(94,575)		(94,575)
Goodwill, net ending balance	84,412		$ 84,412
Income Approach Valuation Technique [Member]
Goodwill [Line Items]
Fair Value, Goodwill, Valuation Approach Allocation			70.00%
Market Approach Valuation Technique [Member]
Goodwill [Line Items]
Fair Value, Goodwill, Valuation Approach Allocation			30.00%
United States & Canada
Goodwill [Roll Forward]
Goodwill			$ 43,872
Accumulated impairment Losses			(5,441)
Goodwill, net beginning balance			38,431
Goodwill impairment			0
Goodwill, ending balance	43,872		43,872
Accumulated impairment Losses	(5,441)		(5,441)
Goodwill, net ending balance	38,431		38,431
Latin America
Goodwill [Roll Forward]
Goodwill			125,681
Accumulated impairment Losses			0
Goodwill, net beginning balance			125,681
Goodwill impairment			(79,700)
Goodwill, ending balance	125,681		125,681
Accumulated impairment Losses	(79,700)		(79,700)
Goodwill, net ending balance	45,981		45,981
EMEA
Goodwill [Roll Forward]
Goodwill			9,434
Accumulated impairment Losses			(9,434)
Goodwill, net beginning balance			0
Goodwill impairment			0
Goodwill, ending balance	9,434		9,434
Accumulated impairment Losses	(9,434)		(9,434)
Goodwill, net ending balance	$ 0		$ 0