Restructuring, Repositioning, and Efficiency (Details) - 2019 Business Optimization - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ 18,668	$ 30,820
Employee Severance
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges		9,100
Professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges		8,500
Asset impairments
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges		11,900
Employee compensation, incentives and benefits
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	2,557	9,062
Professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	4,242	8,537
Occupancy
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	72	889
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ 11,797	$ 12,332