Restructuring, Repositioning, and Efficiency (Details) - 2019 Business Optimization - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ (37)	$ 12,152
Employee compensation, incentives and benefits
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	57	6,505
Professional fees
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	7	4,295
Occupancy
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	2	817
Other
Restructuring Cost and Reserve [Line Items]
Total restructuring and repositioning charges	$ (103)	$ 535