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Compensation and Benefits (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Components of Compensation Expense

			For the Three Months Ended September 30,												For the Nine Months Ended September 30,
			2021						2020						2021						2020
Salaries, incentive compensation and benefits (1)			$	130,831					$	99,517					$	385,106					$	288,186
Long-term cash incentive compensation expense			1,806						—						4,941						—
Restricted share-based award compensation expense			9,598						9,140						29,666						27,392
Long-term incentive compensation awards			11,404						9,140						34,607						27,392
Total compensation and benefits			$	142,235					$	108,657					$	419,713					$	315,578
(1) Excluding long-term incentive compensation awards

Restricted Share-Based Award Activity

			Weighted-Average Grant Date Fair Value						Restricted Stock Awards and Restricted Stock Units
Unvested at January 1, 2021			$	35.09					5,293,642
Granted			52.93						741,555
Forfeited			29.85						(98,197)
Vested			31.53						(685,178)
Unvested at September 30, 2021			$	38.17					5,251,822

Nonvested Restricted Stock Shares Activity

			Weighted-Average Grant Date Fair Value						Performance Share Units
Unvested at January 1, 2021			$	52.45					60,000
Granted			68.58						75,230
Forfeited			—						—
Vested			—						—
Unvested at September 30, 2021			$	61.42					135,230

Change in Value of Investments

						For the Three Months Ended September 30,												For the Nine Months Ended September 30,
Statement of Operations Section			Statement of Operations Line Item			2021						2020						2021						2020
Operating expenses			Compensation and benefits			$	83					$	—					$	297					$	—
Non-operating income (expense)			Other net investment gain (loss)			(356)						—						2,117						—

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Tabular disclosure of investment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-URI http://asc.fasb.org/topic&trid=2197064

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-URI http://asc.fasb.org/topic&trid=75115024

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-URI http://asc.fasb.org/topic&trid=2196928

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Topic 323
-URI http://asc.fasb.org/topic&trid=2196965

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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