Segment Information - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Segment	Sep. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			4
Revenues	$ 770,305	$ 673,962	$ 2,312,933	$ 1,971,264
Bermuda, Cayman Islands, Ireland and London
Segment Reporting Information [Line Items]
Revenues	$ 17,400	$ 9,100	$ 54,000	$ 25,400