Reinsurance - Home Re Entities Total Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effects of Reinsurance [Line Items]
Total assets	$ 6,538,380	$ 6,213,793
Home Re 2023-1
Effects of Reinsurance [Line Items]
Total assets	330,277
Home Re 2022-1
Effects of Reinsurance [Line Items]
Total assets	427,279	473,575
Home Re 2021-2
Effects of Reinsurance [Line Items]
Total assets	174,431	357,340	$ 398,429
Home Re 2021-1
Effects of Reinsurance [Line Items]
Total assets	118,043	285,039	398,848
Home Re 2020-1
Effects of Reinsurance [Line Items]
Total assets	41,846	119,159	251,387
Home Re 2019-1
Effects of Reinsurance [Line Items]
Total assets	21,039	208,146	208,146
Home Re 2018-1
Effects of Reinsurance [Line Items]
Total assets	$ 73,872	$ 146,822	$ 218,343