Reinsurance Receivables - Schedule of Direct, Assumed and Ceded (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Premiums written:
Direct amount	$ 353,614	$ 306,284	$ 707,674	$ 627,173
Ceded to other companies	191,501	159,499	379,630	329,548
Assumed from other companies	73,104	89,909	171,874	138,067
Net amount	$ 235,217	$ 236,694	$ 499,918	$ 435,692
Percentage of amount - assumed to net	31.10%	38.00%	34.40%	31.70%
Premiums earned:
Direct amount	$ 310,918	$ 248,606	$ 624,396	$ 538,106
Ceded to other companies	168,051	134,574	344,143	325,209
Assumed from other companies	73,074	62,926	144,104	110,980
Net amount	$ 215,941	$ 176,958	$ 424,357	$ 323,877
Percentage of amount - assumed to net	33.80%	35.60%	34.00%	34.30%
Life insurance
Premiums written:
Direct amount	$ 24,036	$ 20,732	$ 44,095	$ 39,304
Ceded to other companies	11,428	10,551	19,822	21,578
Assumed from other companies	46	277	95	687
Net amount	$ 12,654	$ 10,458	$ 24,368	$ 18,413
Percentage of amount - assumed to net	0.40%	2.60%	0.40%	3.70%
Premiums earned:
Direct amount	$ 20,541	$ 17,481	$ 40,481	$ 34,974
Ceded to other companies	10,309	9,646	20,435	19,411
Assumed from other companies	139	335	307	675
Net amount	$ 10,371	$ 8,170	$ 20,353	$ 16,238
Percentage of amount - assumed to net	1.30%	4.10%	1.50%	4.20%
Accident and health insurance
Premiums written:
Direct amount	$ 33,327	$ 29,423	$ 68,165	$ 61,586
Ceded to other companies	22,779	20,016	46,325	42,683
Assumed from other companies	6,647	567	6,896	5,428
Net amount	$ 17,195	$ 9,974	$ 28,736	$ 24,331
Percentage of amount - assumed to net	38.70%	5.70%	24.00%	22.30%
Premiums earned:
Direct amount	$ 33,316	$ 29,322	$ 69,374	$ 59,501
Ceded to other companies	22,518	19,625	47,069	40,100
Assumed from other companies	6,709	1,683	7,041	5,474
Net amount	$ 17,507	$ 11,380	$ 29,346	$ 24,875
Percentage of amount - assumed to net	38.30%	14.80%	24.00%	22.00%
Property and liability insurance
Premiums written:
Direct amount	$ 296,251	$ 256,129	$ 595,414	$ 526,283
Ceded to other companies	157,294	128,932	313,483	265,287
Assumed from other companies	66,411	89,065	164,883	131,952
Net amount	$ 205,368	$ 216,262	$ 446,814	$ 392,948
Percentage of amount - assumed to net	32.30%	41.20%	36.90%	33.60%
Premiums earned:
Direct amount	$ 257,061	$ 201,803	$ 514,541	$ 443,631
Ceded to other companies	135,224	105,303	276,639	265,698
Assumed from other companies	66,226	60,908	136,756	104,831
Net amount	$ 188,063	$ 157,408	$ 374,658	$ 282,764
Percentage of amount - assumed to net	35.20%	38.70%	36.50%	37.10%