Reinsurance (Tables)

12 Months Ended

Dec. 31, 2019

Reinsurance [Abstract]

Summary of the Effects of Reinsurance

	2019		2018
WRITTEN
Direct	$	62,982,820	$	61,125,339
Reinsurance assumed		204,268		168,096
Reinsurance ceded		(9,951,880)		(11,280,526)
Net	$	53,235,208	$	50,012,909
EARNED
Direct	$	62,559,208	$	57,702,159
Reinsurance assumed		207,685		174,235
Reinsurance ceded		(9,925,127)		(10,759,433)
Net	$	52,841,766	$	47,116,961
LOSSES AND SETTLEMENT EXPENSES INCURRED
Direct	$	44,334,298	$	35,263,637
Reinsurance assumed		139,618		77,909
Reinsurance ceded		(10,759,079)		(4,079,084)
Net	$	33,714,837	$	31,262,462

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, 2019		Total	Written		Total
Aspen Insurance UK Ltd	A	$	2,219	17.2%	$	1,174	11.8%
Platinum Underwriters	A		1,868	14.5%		1,792	18.0%
Hannover Ruckversicherungs	A+		1,386	10.8%		1,318	13.2%
Partner Reinsurance Company	A+		1,362	10.6%		281	2.8%
Everest Reinsurance Company	A+		1,252	9.7%		781	7.9%
Swiss Reinsurance	A+		902	7.0%		340	3.4%
Endurance Reinsurance	A+		709	5.5%		—	0.0%
General Reinsurance Corporation	A++		677	5.3%		1,334	13.4%
Allied World Reinsurance	A		500	3.9%		634	6.4%
Axis Reinsurance Company	A+		468	3.6%		408	4.1%
All other reinsurers including anticipated subrogation			1,531	11.9%		1,890	19.0%
		$	12,874	100.0%	$	9,952	100.0%