Reinsurance (Tables)

12 Months Ended

Dec. 31, 2018

Reinsurance [Abstract]

Summary of the Effects of Reinsurance

	2018		2017
WRITTEN
Direct	$	61,125,339	$	53,670,397
Reinsurance assumed		168,096		269,184
Reinsurance ceded		(11,280,526)		(7,952,661)
Net	$	50,012,909	$	45,986,920
EARNED
Direct	$	57,702,159	$	51,862,625
Reinsurance assumed		174,235		299,086
Reinsurance ceded		(10,759,433)		(7,948,440)
Net	$	47,116,961	$	44,213,271
LOSSES AND SETTLEMENT EXPENSES INCURRED
Direct	$	35,263,637	$	37,543,652
Reinsurance assumed		77,909		150,051
Reinsurance ceded		(4,079,084)		(8,683,870)
Net	$	31,262,462	$	29,009,833

Summary of Net Reinsurance Balances Recoverable

			Net Reinsurer		Ceded
	A.M. Best	S & P	Exposure as of	Percent of	Premiums	Percent of
(In thousands)	Rating	Rating	December 31, 2018	Total	Written	Total
Everest Reinsurance Company	A+	A+	2,457	29.1%	958	8.5%
Hannover Ruckversicherungs	A+	AA-	1,883	22.3%	1,395	12.4%
Aspen Insurance UK Ltd	A	A	1,655	19.6%	1,764	15.6%
Platinum Underwriters	A	A-	948	11.2%	1,372	12.2%
Toa Reinsurance Company	A	A+	848	10.0%	—	0.0%
Allied World Reinsurance	A	A	801	9.5%	967	8.6%
Swiss Reinsurance	A+	AA-	794	9.4%	450	4.0%
Partner Reinsurance Company	A	A+	767	9.1%	491	4.4%
General Reinsurance Corporation	A++	AA+	665	7.9%	1,202	10.7%
Endurance Reinsurance	A	A	328	3.9%	895	7.9%
All other reinsurers including anticipated subrogation			(2,692)	-31.8%	1,786	15.8%
			8,454	100.0%	11,280	100.0%