Variable Interest Entity and Noncontrolling Interests - Non-redeemable noncontrolling interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Non-redeemable noncontrolling interest, beginning of year	$ 0	$ 823,007
Amounts attributable to nonredeemable noncontrolling interests	0	(78,314)	$ (53,076)
Other comprehensive (income) loss attributable to noncontrolling interests	0	13,984	(9,062)
Non-redeemable noncontrolling interest, end of year	0	0	823,007
Somers Holdings Ltd. | Noncontrolling Interest
Noncontrolling Interest [Line Items]
Non-redeemable noncontrolling interest, beginning of year	0	823,007
Impact of deconsolidation of Somers	0	(918,874)
Additional paid in capital attributable to noncontrolling interests	0	22,113
Amounts attributable to nonredeemable noncontrolling interests	0	78,314
Other comprehensive (income) loss attributable to noncontrolling interests	0	(4,560)
Non-redeemable noncontrolling interest, end of year	$ 0	$ 0	$ 823,007