Restructuring - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 22,286	$ 13,281
Right-of-Use Asset Impairment
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	15,742	8,723
Operating Lease Charges
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	1,449	799
Fixed Asset Impairment
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	2,689	1,497
Severance
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	2,031	1,136
Other Expenses
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 375	$ 1,126