Reinsurance - Ceded and Assumed Reinsurance (Details) - Property and casualty business - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance [Line Items]
Ceded premiums written	$ 153,792	$ 99,732	$ 100,541
Ceded premiums earned	144,958	101,740	92,650
Loss and loss settlement expenses ceded	96,603	89,102	51,878
Assumed premiums written	232,716	190,215	130,375
Assumed premiums earned	225,587	163,980	77,283
Loss and loss settlement expenses assumed	$ 133,423	$ 104,096	$ 45,543