Compensation and Benefits - Restricted Share Activity (Details)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Restricted Stock
Restricted Stock Awards and Restricted Stock Units
Beginning balance (in shares) | shares	5,005,422
Granted (in shares) | shares	919,455
Forfeited (in shares) | shares	(24,778)
Vested (in shares) | shares	(588,144)
Ending balance (in shares) | shares	5,311,955
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 35.00
Granted (in dollars per share) | $ / shares	33.80
Forfeited (in dollars per share) | $ / shares	30.30
Vested (in dollars per share) | $ / shares	32.59
Ending balance (in dollars per share) | $ / shares	$ 35.08
Performance Shares
Restricted Stock Awards and Restricted Stock Units
Beginning balance (in shares) | shares	0
Granted (in shares) | shares	60,000
Forfeited (in shares) | shares	0
Vested (in shares) | shares	0
Ending balance (in shares) | shares	60,000
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	52.45
Forfeited (in dollars per share) | $ / shares	0
Vested (in dollars per share) | $ / shares	0
Ending balance (in dollars per share) | $ / shares	$ 52.45