Restructuring, Repositioning, and Efficiency (Details) - 2019 Business Optimization $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ 12,152
Employee Severance
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	6,500
Professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	4,300
Employee compensation, incentives and benefits
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	6,505
Professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	4,295
Occupancy
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	817
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ 535