Investments - Schedule of the separate account managed by TP LLC (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Total assets	$ 2,469,544	$ 2,136,542
Liabilities
Total liabilities and shareholders' equity	324	2,411
Total net investments managed by Third Point LLC	2,469,220	2,134,131
TP Fund
Assets
Total assets	818,600	1,284,004
Total investments
Assets
Total assets	1,038,645	1,523,644
Debt Securities
Assets
Total assets	220,045	239,640
Cash and cash equivalents
Assets
Total assets	611,442	1,017
Restricted cash and cash equivalents
Assets
Total assets	816,519	609,154
Due from brokers
Assets
Total assets	0	1,411
Interest and dividends receivable
Assets
Total assets	2,932	1,316
Other Assets [Member]
Assets
Total assets	6	0
Accounts payable and accrued expenses
Liabilities
Total liabilities and shareholders' equity	324	114
Participation agreement with related party investment fund
Liabilities
Total liabilities and shareholders' equity	$ 0	$ 2,297