Basis of Presentation and Summary of Significant Accounting Polices - Restructuring Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve
Restructuring liabilities	$ 1,053	$ 1,531
Restructuring Reserve [Roll Forward]
Beginning Balance	1,531	5,383	$ 0
Restructuring expenses	8,928	6,586	10,354
Payments	(7,442)	(10,438)	(4,971)
Other	(1,964)
Ending Balance	1,053	1,531	5,383
Non-cash asset write-offs	900
Accelerated lease costs	1,100
Operating Segments | North America
Restructuring Cost and Reserve
Restructuring liabilities	336	0
Restructuring Reserve [Roll Forward]
Restructuring expenses	1,226	3,597	3,668
Operating Segments | Europe & Africa
Restructuring Cost and Reserve
Restructuring liabilities	30	513
Restructuring Reserve [Roll Forward]
Restructuring expenses	3,828	1,646	2,942
Corporate
Restructuring Cost and Reserve
Restructuring liabilities	687	1,018
Restructuring Reserve [Roll Forward]
Restructuring expenses	3,874	1,343	$ 3,744
Accrued liabilities
Restructuring Cost and Reserve
Restructuring liabilities	1,053	1,391
Accrued liabilities | Operating Segments | North America
Restructuring Cost and Reserve
Restructuring liabilities	336	0
Accrued liabilities | Operating Segments | Europe & Africa
Restructuring Cost and Reserve
Restructuring liabilities	30	373
Accrued liabilities | Corporate
Restructuring Cost and Reserve
Restructuring liabilities	$ 687	1,018
Other long-term liabilities
Restructuring Cost and Reserve
Restructuring liabilities		140
Other long-term liabilities | Operating Segments | North America
Restructuring Cost and Reserve
Restructuring liabilities		0
Other long-term liabilities | Operating Segments | Europe & Africa
Restructuring Cost and Reserve
Restructuring liabilities		140
Other long-term liabilities | Corporate
Restructuring Cost and Reserve
Restructuring liabilities		$ 0