CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Reinsurance balances receivable, allowance	$ 89,000	$ 0
Loss and loss adjustment expenses recoverable, allowance	47,000	47,000
Notes receivable, allowance	$ 1,000,000	$ 15,000,000
Preferred share capital, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred share capital, authorized (in shares)	50,000,000	50,000,000
Preferred share capital, issued (in shares)	0	0
Common Class A
Ordinary share capital, par value (in dollars per share)	$ 0.10	$ 0.10
Ordinary share capital, authorized (in shares)	100,000,000	100,000,000
Ordinary share capital, issued (in shares)	30,017,870	30,739,395
Ordinary share capital, outstanding (in shares)	30,017,870	30,739,395
Common Class B
Ordinary share capital, par value (in dollars per share)	$ 0.10	$ 0.10
Ordinary share capital, authorized (in shares)	25,000,000	25,000,000
Ordinary share capital, issued (in shares)	6,254,715	6,254,715
Ordinary share capital, outstanding (in shares)	6,254,715	6,254,715