Discontinued Operations - Results of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Foreign currency translation gain (loss)			$ 4,570
Revenues
Net earned premiums	$ 611	$ 1,173	49,233
Net investment income	142	514	2,717
Realized Investment gains, net	1,267	830	14,329
Other Income		338
Total revenue	2,020	2,855	66,279
Expenses
Net losses and loss adjustment expenses incurred	10,463	11,197	50,787
Policy acquisition expenses	218	401	9,544
General and administrative expenses	57	(8,401)	27,533
Interest expense		218	1,648
Foreign exchange gains			(4,570)
Other expense			19,105
Total expenses	10,738	3,415	104,047
Loss from discontinued operations before income taxes	(8,718)	(560)	(37,768)
Income tax benefit	(2,114)	(1,374)	(679)
Net (loss) income from discontinued operations	(6,604)	814	$ (37,089)
Insurance Operations, U.K. | Discontinued operation
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) recognized	0
Cash and securities deposited	10,400
Letters of credit and securities placed	$ 23,200
Quota share reinsurance (as a percent)	100.00%
Aggregate Stop Loss reinsurance protection, liability	$ 24,000	$ 13,300