Management, performance and founders fees (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Aug. 31, 2018
Related Party Transaction
Management and performance fees to related parties	$ 0	[1]	$ (14,493)	[1]	$ 0	$ (24,540)
Affiliate costs, gross of TP fund fees	5,143		14,493		9,986	24,540
Management and performance fees
Related Party Transaction
Management and performance fees to related parties	0		(14,493)		0	(24,540)
Third Point Advisors LLC
Related Party Transaction
Annual investment performance fee								20.00%
Third Point LLC
Related Party Transaction
Annual investment management fee								1.50%
Third Point LLC | Management and performance fees
Related Party Transaction
Management and performance fees to related parties	0		(9,635)		0	(19,410)
Third Point Advisors LLC | Management and performance fees
Related Party Transaction
Management and performance fees to related parties	$ 0		(4,858)		$ 0	(5,130)
TP Fund
Related Party Transaction
Annual investment performance fee	20.00%				20.00%
Annual investment management fee	1.25%				1.25%		1.50%
Management and performance fees to related parties	$ (17,864)		0		$ (52,105)	0
Performance Fees - Loss Carryforward
Related Party Transaction
Management and performance fees to related parties	(12,721)		$ 0		(42,119)	$ 0
Third Point Re BDA
Related Party Transaction
Loss Recovery Account Forfeitures					1,300
Loss Recovery Account	5,300				5,300		$ 46,800
Third Point Re USA
Related Party Transaction
Loss Recovery Account Forfeitures					1,300
Loss Recovery Account	$ 600				$ 600		$ 3,800

[1] Effective August 31, 2018, Third Point Reinsurance Ltd., Third Point Reinsurance Company Ltd. (“Third Point Re BDA”) and Third Point Reinsurance (USA) Ltd. (“Third Point Re USA”) and together with Third Point Re BDA, the “TPRE Limited Partners”, entered into a Limited Partnership Agreement (the “2018 LPA”) to invest in Third Point Enhanced LP (“TP Fund”), a related party investment fund. As a result, the management and performance fees are presented within net investment income from investment in related party investment fund from the effective date of the 2018 LPA. Management and performance fees incurred prior to the effective date of the 2018 LPA are reflected in management and performance fees to related parties.