Reinsurance (Tables)

12 Months Ended

Dec. 31, 2020

Reinsurance [Abstract]

Summary of the Effects of Reinsurance

	2020		2019
WRITTEN
Direct	$	58,982,300	$	62,982,820
Reinsurance assumed		183,204		204,268
Reinsurance ceded		(10,118,373)		(9,951,880)
Net	$	49,047,131	$	53,235,208
EARNED
Direct	$	59,587,071	$	62,559,208
Reinsurance assumed		182,416		207,685
Reinsurance ceded		(10,080,285)		(9,925,127)
Net	$	49,689,202	$	52,841,766
LOSSES AND SETTLEMENT EXPENSES INCURRED
Direct	$	47,067,297	$	44,334,298
Reinsurance assumed		73,597		139,618
Reinsurance ceded		(14,578,906)		(10,759,079)
Net	$	32,561,988	$	33,714,837

Summary of Net Reinsurance Balances Recoverable

		Net Reinsurer			Ceded
	A.M. Best	Exposure as of		Percent of	Premiums		Percent of
(In thousands)	Rating	December 31, 2020		Total	Written		Total
Platinum Underwriters	A+	$	2,724	18.0%	$	1,988	19.6%
Hannover Ruckversicherungs	A+		1,961	12.9%		1,592	15.7%
Everest Reinsurance Company	A+		1,684	11.1%		878	8.7%
Aspen Insurance UK Ltd	A		1,570	10.4%		268	2.6%
Partner Reinsurance Company	A+		1,495	9.9%		249	2.5%
Swiss Reinsurance	A+		1,230	8.1%		274	2.7%
XL Reinsurance	A		699	4.6%		—	0.1%
General Reinsurance Corporation	A++		677	4.5%		1,364	13.5%
Endurance Reinsurance	A+		591	3.9%		276	2.7%
Liberty Mutual Insurance Company	A		577	3.8%		807	8.0%
All other reinsurers including anticipated subrogation			1,959	12.9%		2,422	23.9%
		$	15,167	100.0%	$	10,118	100.0%