Reserves for Losses and Loss Adjustment Expenses - Schedule of Short-Duration Insurance Contracts (Details) $ in Thousands	Dec. 31, 2022 USD ($) claim	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Claims Development [Line Items]
Total net reserves for loss and LAE	$ 698,091
Short Tail/Monoline Specialty
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	371,536
Cumulative net paid loss and LAE from the table below	(218,145)
Net reserves for loss and LAE before 2018	5,512
Total net reserves for loss and LAE	158,903
Cumulative net paid loss and LAE	218,145
Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	1,177,516
Cumulative net paid loss and LAE from the table below	(821,766)
Net reserves for loss and LAE before 2018	4,945
Total net reserves for loss and LAE	360,695
Cumulative net paid loss and LAE	821,766
Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	782,059
Cumulative net paid loss and LAE from the table below	(612,456)
Net reserves for loss and LAE before 2018	8,890
Total net reserves for loss and LAE	178,493
Cumulative net paid loss and LAE	612,456
Accident Year 2013 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	69,515	$ 69,496	$ 75,419	$ 74,987	$ 74,701	$ 75,196	$ 73,382	$ 64,439	$ 71,800	$ 66,517
Cumulative net paid loss and LAE from the table below	(74,178)	(75,030)	(75,340)	(75,117)	(73,511)	(67,857)	(59,460)	(48,673)	(40,425)	(19,912)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1,994
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	3,324
Cumulative net paid loss and LAE	$ 74,178	75,030	75,340	75,117	73,511	67,857	59,460	48,673	40,425	19,912
Accident Year 2013 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	54,130	53,236	49,486	49,850	48,372	48,372	46,437	44,909	37,993	44,791
Cumulative net paid loss and LAE from the table below	(49,605)	(48,322)	(48,069)	(47,101)	(44,186)	(41,158)	(42,995)	(36,890)	(17,904)	(4,763)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 2,031
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	2,640
Cumulative net paid loss and LAE	$ 49,605	48,322	48,069	47,101	44,186	41,158	42,995	36,890	17,904	$ 4,763
Accident Year 2014 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	120,777	120,697	118,995	117,783	116,970	116,970	115,749	100,355	100,355
Cumulative net paid loss and LAE from the table below	(104,076)	(106,214)	(105,756)	(104,984)	(101,984)	(96,639)	(81,251)	(63,699)	(32,530)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 946
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,977
Cumulative net paid loss and LAE	$ 104,076	106,214	105,756	104,984	101,984	96,639	81,251	63,699	32,530
Accident Year 2014 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	71,761	71,219	69,920	68,855	63,729	63,729	62,425	57,904	64,186
Cumulative net paid loss and LAE from the table below	(55,737)	(53,615)	(53,290)	(52,450)	(49,906)	(50,785)	(42,141)	(30,863)	(9,700)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 11,475
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,149
Cumulative net paid loss and LAE	$ 55,737	53,615	53,290	52,450	49,906	50,785	42,141	30,863	$ 9,700
Accident Year 2015 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	122,902	122,839	121,746	119,216	117,024	117,024	114,266	103,191
Cumulative net paid loss and LAE from the table below	(118,166)	(117,295)	(114,098)	(108,291)	(99,401)	(88,833)	(72,137)	(44,152)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 2,446
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	5,364
Cumulative net paid loss and LAE	$ 118,166	117,295	114,098	108,291	99,401	88,833	72,137	44,152
Accident Year 2015 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	84,058	83,365	80,678	75,187	70,803	68,008	65,063	61,810
Cumulative net paid loss and LAE from the table below	(81,789)	(80,312)	(77,981)	(73,100)	(65,269)	(55,610)	(41,653)	(9,026)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1,779
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,550
Cumulative net paid loss and LAE	$ 81,789	80,312	77,981	73,100	65,269	55,610	41,653	$ 9,026
Accident Year 2016 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	73,318	73,200	69,701	62,643	62,843	62,843	63,223
Cumulative net paid loss and LAE from the table below	(71,565)	(63,893)	(60,864)	(58,895)	(53,352)	(42,528)	(23,239)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1,523
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,691
Cumulative net paid loss and LAE	$ 71,565	63,893	60,864	58,895	53,352	42,528	23,239
Accident Year 2016 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	105,852	104,612	103,602	93,324	91,119	92,743	93,526
Cumulative net paid loss and LAE from the table below	(87,966)	(85,794)	(81,516)	(78,070)	(70,253)	(57,638)	(36,592)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 5,975
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,858
Cumulative net paid loss and LAE	$ 87,966	85,794	81,516	78,070	70,253	57,638	$ 36,592
Accident Year 2017 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	78,762	78,578	72,913	64,260	65,332	65,332
Cumulative net paid loss and LAE from the table below	(69,096)	(67,243)	(64,235)	(53,093)	(41,945)	(23,770)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 4,331
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	5,515
Cumulative net paid loss and LAE	$ 69,096	67,243	64,235	53,093	41,945	23,770
Accident Year 2017 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	98,646	97,011	95,119	82,545	80,341	75,919
Cumulative net paid loss and LAE from the table below	(68,434)	(63,516)	(56,839)	(51,985)	(52,103)	(34,177)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 33,630
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,309
Cumulative net paid loss and LAE	$ 68,434	63,516	56,839	51,985	52,103	$ 34,177
Accident Year 2018 | Short Tail/Monoline Specialty
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	34,363	36,863	33,570	33,570	33,570
Cumulative net paid loss and LAE from the table below	(33,446)	(33,522)	(31,323)	(31,907)	(24,754)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 559
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	858
Cumulative net paid loss and LAE	$ 33,446	33,522	31,323	31,907	24,754
Accident Year 2018 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	74,209	73,868	73,868	74,476	74,476
Cumulative net paid loss and LAE from the table below	(70,080)	(64,119)	(50,320)	(42,568)	(26,201)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 10,202
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	5,041
Cumulative net paid loss and LAE	$ 70,080	64,119	50,320	42,568	26,201
Accident Year 2018 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	96,685	90,348	78,902	68,125	73,492
Cumulative net paid loss and LAE from the table below	(90,791)	(80,448)	(67,262)	(60,149)	(25,552)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 335
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,864
Cumulative net paid loss and LAE	$ 90,791	80,448	67,262	60,149	$ 25,552
Accident Year 2019 | Short Tail/Monoline Specialty
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	48,800	45,301	48,101	62,922
Cumulative net paid loss and LAE from the table below	(45,031)	(41,484)	(40,228)	(33,714)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 230
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	1,015
Cumulative net paid loss and LAE	$ 45,031	41,484	40,228	33,714
Accident Year 2019 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	110,896	106,432	106,432	107,432
Cumulative net paid loss and LAE from the table below	(96,601)	(78,803)	(59,529)	(33,019)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1,487
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	6,021
Cumulative net paid loss and LAE	$ 96,601	78,803	59,529	33,019
Accident Year 2019 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	106,594	92,118	90,598	87,115
Cumulative net paid loss and LAE from the table below	(82,878)	(66,682)	(63,243)	(28,636)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 2,487
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	5,549
Cumulative net paid loss and LAE	$ 82,878	66,682	63,243	$ 28,636
Accident Year 2020 | Short Tail/Monoline Specialty
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	64,859	64,859	66,359
Cumulative net paid loss and LAE from the table below	(70,684)	(56,499)	(30,974)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 6,614
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	1,258
Cumulative net paid loss and LAE	$ 70,684	56,499	30,974
Accident Year 2020 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	134,124	140,880	140,880
Cumulative net paid loss and LAE from the table below	(83,533)	(67,216)	(33,538)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 27,390
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	5,393
Cumulative net paid loss and LAE	$ 83,533	67,216	33,538
Accident Year 2020 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	86,700	86,700	83,900
Cumulative net paid loss and LAE from the table below	(63,468)	(54,950)	(24,468)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 5,196
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	4,719
Cumulative net paid loss and LAE	$ 63,468	54,950	$ 24,468
Accident Year 2021 | Short Tail/Monoline Specialty
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	100,172	100,172
Cumulative net paid loss and LAE from the table below	(49,526)	(14,754)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 25,018
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	1,428
Cumulative net paid loss and LAE	$ 49,526	14,754
Accident Year 2021 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	169,566	173,568
Cumulative net paid loss and LAE from the table below	(78,923)	(39,388)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 60,497
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	6,486
Cumulative net paid loss and LAE	$ 78,923	39,388
Accident Year 2021 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	46,146	49,957
Cumulative net paid loss and LAE from the table below	(15,449)	(9,856)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 33,733
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	2,265
Cumulative net paid loss and LAE	$ 15,449	$ 9,856
Accident Year 2022 | Short Tail/Monoline Specialty
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	123,342
Cumulative net paid loss and LAE from the table below	(19,458)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 80,974
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	1,282
Cumulative net paid loss and LAE	$ 19,458
Accident Year 2022 | Multi-line Solutions
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	223,447
Cumulative net paid loss and LAE from the table below	(55,548)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 105,571
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	7,330
Cumulative net paid loss and LAE	$ 55,548
Accident Year 2022 | Exited Lines
Claims Development [Line Items]
Incurred losses and ALAE, net of reinsurance	31,487
Cumulative net paid loss and LAE from the table below	(16,339)
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 9,336
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | claim	185
Cumulative net paid loss and LAE	$ 16,339