Taxation - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Expected income tax benefit (expense)	$ 114,721	$ 53,093	$ 25,489
Nondeductible expenses	(508)	(334)	5,074
Reinsurance adjustment	(1,265)	(4,604)	0
Income tax audit adjustment	0	0	3,424
Effect of change in tax rate	7,461	14,904	3,055
Transfer pricing	0	224	206
GAAP to statutory accounting difference	(6,019)	0	0
U.S. base erosion and anti-abuse tax	0	(1,725)	(36)
Withholding tax	(2,154)	(1,013)	(1,822)
Non-taxable loss on sale of RenaissanceRe UK	0	0	(6,091)
Change in valuation allowance	(62,133)	(42,819)	(13,003)
Foreign branch adjustments	11,656	(5,491)	(17,821)
Other	(2,740)	(1,567)	(1,337)
Income tax benefit (expense)	$ 59,019	$ 10,668	$ (2,862)