Reinsurance (Tables)

12 Months Ended

Dec. 31, 2020

Reinsurance Disclosures [Abstract]

Ceded reinsurance

Assumed, ceded and net amounts for the years ended December 31, 2020, 2019 and 2018 were as follows (in thousands of U.S. dollars): 

	Premiums Written		Premiums Earned		Losses and Loss Expenses
2020
Non-life	$	5,376,703	$	5,571,201	$	4,358,975
Life and Health	1,499,222		1,505,819		1,344,117
Assumed	$	6,875,925	$	7,077,020	$	5,703,092
Non-life	$	550,784	$	516,672	$	342,271
Life and Health	24,283		23,522		25,921
Ceded	$	575,067	$	540,194	$	368,192
Non-life	$	4,825,919	$	5,054,529	$	4,016,704
Life and Health	1,474,939		1,482,297		1,318,196
Net	$	6,300,858	$	6,536,826	$	5,334,900

	Premiums Written		Premiums Earned		Losses and Loss Expenses
2019
Non-life (1)	$	5,792,542	$	5,433,357	$	3,879,242
Life and Health	1,492,778		1,489,721		1,277,684
Assumed	$	7,285,320	$	6,923,078	$	5,156,926
Non-life (1)	$	353,735	$	375,301	$	219,102
Life and Health	22,527		22,559		14,668
Ceded	$	376,262	$	397,860	$	233,770
Non-life (1)	$	5,438,807	$	5,058,056	$	3,660,140
Life and Health	1,470,251		1,467,162		1,263,016
Net	$	6,909,058	$	6,525,218	$	4,923,156

	Premiums Written		Premiums Earned		Losses and Loss Expenses
2018
Non-life	$	5,064,780	$	4,751,958	$	3,566,201
Life and Health	1,235,149		1,235,973		1,035,363
Assumed	$	6,299,929	$	5,987,931	$	4,601,564
Non-life	$	472,498	$	450,096	$	397,554
Life and Health	24,067		24,025		10,755
Ceded	$	496,565	$	474,121	$	408,309
Non-life	$	4,592,282	$	4,301,862	$	3,168,647
Life and Health	1,211,082		1,211,948		1,024,608
Net	$	5,803,364	$	5,513,810	$	4,193,255

(1)Non-life Losses and loss expenses include amounts allocated to Corporate and Other as disclosed in Note 18.