Restructuring Charges - Summary of Changes (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended	18 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2020
Restructuring Reserve [Roll Forward]
Accruals	$ 29,300	$ 46,900
Centralization of Global Sales and Marketing Structure
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		11,512
Accruals		9,457	$ 12,000	$ 21,500
Payments		9,744
Ending balance June 30, 2020	11,225	11,225	11,512	11,225
Cumulative Charges Incurred	21,483	21,483		21,483
Expected Additional Expenses to be Incurred	1,949	1,949		1,949
Workforce Reduction Plan
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		0
Accruals		25,382
Payments		10,872
Ending balance June 30, 2020	14,509	14,509	0	14,509
Cumulative Charges Incurred	25,382	25,382		25,382
Expected Additional Expenses to be Incurred	1,537	1,537		1,537
Termination benefits | Centralization of Global Sales and Marketing Structure
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		8,389
Accruals		2,620
Payments		2,748
Ending balance June 30, 2020	8,261	8,261	8,389	8,261
Cumulative Charges Incurred	11,500	11,500		11,500
Expected Additional Expenses to be Incurred	312	312		312
Termination benefits | Workforce Reduction Plan
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		0
Accruals		25,382
Payments		10,872
Ending balance June 30, 2020	14,509	14,509	0	14,509
Cumulative Charges Incurred	25,382	25,382		25,382
Expected Additional Expenses to be Incurred	1,537	1,537		1,537
Contract termination costs | Centralization of Global Sales and Marketing Structure
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		338
Accruals		0
Payments		0
Ending balance June 30, 2020	338	338	338	338
Cumulative Charges Incurred	338	338		338
Expected Additional Expenses to be Incurred	390	390		390
Contract termination costs | Workforce Reduction Plan
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		0
Accruals		0
Payments		0
Ending balance June 30, 2020	0	0	0	0
Cumulative Charges Incurred	0	0		0
Expected Additional Expenses to be Incurred	0	0		0
Other related costs | Centralization of Global Sales and Marketing Structure
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		2,785
Accruals		6,837
Payments		6,996
Ending balance June 30, 2020	2,626	2,626	2,785	2,626
Cumulative Charges Incurred	9,645	9,645		9,645
Expected Additional Expenses to be Incurred	1,247	1,247		1,247
Other related costs | Workforce Reduction Plan
Restructuring Reserve [Roll Forward]
Beginning balance January 1, 2020		0
Accruals		0
Payments		0
Ending balance June 30, 2020	0	0	$ 0	0
Cumulative Charges Incurred	0	0		0
Expected Additional Expenses to be Incurred	$ 0	$ 0		$ 0