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Restructuring Activities and Other Charges (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Dec. 14, 2015	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				$ 1,349
Restructuring charges	$ 6,700	$ 3,698	$ 0	7,632	$ 0
Cash payments				(6,860)
Restructuring Reserve, Settled without Cash				(362)
Balance as of June 30, 2019		1,759		1,759
Restructuring costs				7,632
North America
Restructuring Reserve [Roll Forward]
Restructuring costs				1,408
EMEA [Member]
Restructuring Reserve [Roll Forward]
Restructuring costs				1,405
LATAM SEF [Member]
Restructuring Reserve [Roll Forward]
Restructuring costs				74
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring costs				4,745
Employee Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				357
Restructuring charges	5,600			2,174
Cash payments				(1,282)
Restructuring Reserve, Settled without Cash				(194)
Balance as of June 30, 2019		1,055		1,055
Contract Termination
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				286
Restructuring charges	$ 1,100			759
Cash payments				(763)
Restructuring Reserve, Settled without Cash				(168)
Balance as of June 30, 2019		114		114
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				706
Restructuring charges				4,699
Cash payments				(4,815)
Restructuring Reserve, Settled without Cash				0
Balance as of June 30, 2019		590		590
2015 Restructuring
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				486
Cash payments				(364)
Balance as of June 30, 2019		122		122
2015 Restructuring \| Employee Severance
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				486
Cash payments				(364)
Balance as of June 30, 2019		122		122
2015 Restructuring \| Contract Termination
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				0
Cash payments				0
Balance as of June 30, 2019		0		0
2015 Restructuring \| Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Balance as of December 31, 2018				0
Cash payments				0
Balance as of June 30, 2019		$ 0		$ 0