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Reserves For Losses And LAE
12 Months Ended
Dec. 31, 2016
Reserves For Losses And LAE [Abstract]  
Reserves For Losses And LAE
3.  RESERVES FOR LOSSES AND LAE

Reserves for losses and LAE.
Activity in the reserve for losses and LAE is summarized for the periods indicated:
 
   
At December 31,
 
(Dollars in thousands)
 
2016
   
2015
   
2014
 
Gross reserves at January 1
 
$
7,940,720
   
$
7,843,856
   
$
7,653,229
 
Less reinsurance recoverables
   
(3,875,073
)
   
(3,702,782
)
   
(3,427,385
)
Net reserves at January 1
   
4,065,647
     
4,141,074
     
4,225,844
 
                         
Incurred related to:
                       
Current year
   
1,441,962
     
1,326,015
     
1,314,887
 
Prior years
   
(91,682
)
   
(6,454
)
   
39,206
 
Total incurred losses and LAE
   
1,350,280
     
1,319,561
     
1,354,093
 
                         
Paid related to:
                       
Current year
   
400,489
     
357,819
     
452,662
 
Prior years
   
892,207
     
946,337
     
926,819
 
Total paid losses and LAE
   
1,292,696
     
1,304,156
     
1,379,481
 
                         
Foreign exchange/translation adjustment
   
8,266
     
(90,832
)
   
(59,382
)
                         
Net reserves at December 31
   
4,131,497
     
4,065,647
     
4,141,074
 
Plus reinsurance recoverables
   
4,199,791
     
3,875,073
     
3,702,782
 
Gross reserves at December 31
 
$
8,331,288
   
$
7,940,720
   
$
7,843,856
 
 
Incurred prior years' reserves decreased by $91,682 thousand and $6,454 thousand for the years ended December 31, 2016 and 2015, respectively, and increased by $39,206 thousand for the year ended December 31, 2014.  The decrease for 2016 was attributable to favorable development in the reinsurance segments of $187,909 thousand related primarily to property and short-tail business in the U.S., property business in Canada, Latin America, Middle East and Africa, as well as favorable development on prior year catastrophe losses, partially offset by $45,668 thousand of adverse development on A&E reserves. Part of the favorable development in the reinsurance segment related to the 2015 loss from the explosion at the Chinese port of Tianjin. In 2015, this loss was originally estimated to be $21,566 thousands. At December 31, 2016, this loss was projected to be $6,261 thousands resulting in $15,305 thousands of favorable development in 2016. The net favorable development in the reinsurance segments was partially offset by $96,227 thousand of unfavorable development in the insurance segment primarily related to run-off construction liability and umbrella program business.

The decrease for 2015 was attributable to $86,540 thousand of favorable development in the reinsurance segments related to treaty casualty, treaty property and catastrophe reserves, partially offset by unfavorable development of $80,086 thousand in the insurance segment primarily related to construction liability and umbrella business.

The increase for 2014 was attributable to an increase of $87,362 thousand in A&E reserves along with unfavorable development of $11,352 thousand in the insurance segment, partially offset by $59,509 thousand of favorable development in the reinsurance segments related to treaty casualty, treaty property and catastrophe reserves.

The following is information about incurred and paid claims development as of December 31, 2016, net of reinsurance, as well as cumulative claim frequency and the total of incurred but not reported liabilities (IBNR) plus expected development on reported claims included within the net incurred claims amounts.  Each of the Company's financial reporting segments has been disaggregated into casualty and property business.  The casualty and property segregation results in groups that have homogeneous loss development characteristics and are large enough to represent credible trends.  Generally, casualty claims take longer to be reported and settled, resulting in longer payout patterns and increased volatility.  Property claims on the other hand, tend to be reported and settled quicker and therefore tend to exhibit less volatility.
 
The property business is more exposed to catastrophe losses, which can result in year over year fluctuations in incurred claims depending on the frequency and severity of catastrophes claims in any one accident year.

The information about incurred and paid claims development for the years ended December 31, 2012 to December 31, 2015 is presented as supplementary information.

These tables present five years of incurred and paid claims development as it is impracticable to retrospectively create the tables for ten years.  For the reinsurance groups, for the years prior to 2012, the total of IBNR plus expected development on reported claims was not prepared on an accident year basis.  The Company calculated these IBNR amounts in the aggregate for each business unit in total as of prior year end points in time.  While business written in the United States would have been allocated to accident year for regulatory reporting purposes, business written outside of the United States would not have been similarly allocated.  Attempting to allocate the non-U.S. business IBNR reserves to accident year currently for older year end valuations would require making assumptions and estimates which may not be in line with assumptions that would have been made at the time.  A similar situation applies to insurance where the accumulation of the business lines reported in the regulatory filings are not consistent with the breakout of the tables presented below.  As a result of not being able to present the information prior to 2012, prospectively an additional year will be added to the tables each reporting year until a ten year table is presented.

The Cumulative Number of Reported Claims is shown only for Insurance Casualty as it is impracticable to provide the information for the remaining groups.  The reinsurance groups each include pro rata contracts for which ceding companies provide only summary information via a bordereau.  This summary information does not include the number of reported claims underlying the paid and reported losses.  Therefore, it is not possible to provide this information.  The Insurance Property group includes Accident & Health insurance business.  This business is written via a master contract and individual claim counts are not provided.  This business represents a significant enough portion of the business in the Insurance Property group so that including the number of reported claims for the remaining business would distort any analytics performed on the group.

The Cumulative Number of Reported Claims shown for the Insurance Casualty is determined by claim and line of business.  For example, a claim event with three claimants in the same line of business is a single claim.  However, a claim event with a single claimant that spans two lines of business contributes two claims.  Cessions under affiliated quota share agreements reduce net losses but do not impact claim counts.
 
The following tables present the incurred loss and ALAE and the paid loss and ALAE, net of reinsurance for casualty and property, as well as the average annual percentage payout of incurred claims by age, net of reinsurance for each of our disclosed lines of business.

U.S. Reinsurance – Casualty Business
 
                                 
At December 31, 2016
 
                                 
Total of
       
                                 
IBNR Liabilites
       
   
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance
   
Plus Expected
       
   
Years Ended December 31,
   
Development
   
Cumulative
 
   
2012
   
2013
   
2014
   
2015
   
2016
   
on Reported
   
Number of
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
         
Claims
   
Reported Claims
 
(Dollars in thousands)
                                       
2012
 
$
249,427
   
$
211,113
   
$
139,581
   
$
139,137
   
$
145,577
     
37,168
     
N/A
 
2013
           
117,039
     
183,581
     
181,005
     
186,086
     
77,332
     
N/A
 
2014
                   
197,453
     
189,580
     
193,693
     
112,260
     
N/A
 
2015
                           
155,854
     
178,324
     
132,688
     
N/A
 
2016
                                   
171,551
     
150,094
     
N/A
 
                                   
$
875,232
                 
                                                         
(Some amounts may not reconcile due to rounding.)
                                                 
 
   
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
 
   
Years Ended December 31,
 
   
2012
   
2013
   
2014
   
2015
   
2016
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
       
(Dollars in thousands)
                           
2012
 
$
2,371
   
$
11,455
   
$
24,593
   
$
54,376
   
$
76,026
 
2013
           
4,645
     
15,589
     
43,205
     
73,793
 
2014
                   
7,102
     
21,782
     
47,847
 
2015
                           
7,881
     
21,851
 
2016
                                   
7,433
 
                                   
$
226,950
 
All outstanding liabilities prior to 2012, net of reinsurance
                     
869,493
 
Liabilities for claims and claim adjustment expenses, net of reinsurance
                   
$
1,517,775
 
                                         
(Some amounts may not reconcile due to rounding.)
                                 
 
   
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (unaudited)
Years
 
1
 
2
 
3
 
4
 
5
Casualty
 
3.4%
 
6.9%
 
12.7%
 
18.2%
 
14.9%
 
 
U.S. Reinsurance – Property Business
 
                                 
At December 31, 2016
 
                                 
Total of
       
                                 
IBNR Liabilites
       
   
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance
   
Plus Expected
       
   
Years Ended December 31,
   
Development
   
Cumulative
 
   
2012
   
2013
   
2014
   
2015
   
2016
   
on Reported
   
Number of
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
         
Claims
   
Reported Claims
 
(Dollars in thousands)
                                       
2012
 
$
581,047
   
$
468,914
   
$
374,436
   
$
371,698
   
$
362,664
     
1,782
     
N/A
 
2013
           
281,153
     
303,058
     
278,774
     
247,991
     
5,341
     
N/A
 
2014
                   
327,032
     
297,400
     
238,264
     
18,179
     
N/A
 
2015
                           
324,705
     
259,346
     
41,130
     
N/A
 
2016
                                   
423,729
     
188,254
     
N/A
 
                                   
$
1,531,994
                 
                                                         
(Some amounts may not reconcile due to rounding.)
                                                 
 
   
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
 
   
Years Ended December 31,
 
   
2012
   
2013
   
2014
   
2015
   
2016
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
       
(Dollars in thousands)
                           
2012
 
$
129,689
   
$
228,584
   
$
285,761
   
$
310,382
   
$
322,765
 
2013
           
119,578
     
165,294
     
199,072
     
213,544
 
2014
                   
110,081
     
163,982
     
189,854
 
2015
                           
113,186
     
166,844
 
2016
                                   
156,865
 
                                   
$
1,049,872
 
All outstanding liabilities prior to 2012, net of reinsurance
                     
54,326
 
Liabilities for claims and claim adjustment expenses, net of reinsurance
                   
$
536,448
 
                                         
(Some amounts may not reconcile due to rounding.)
                                 
 
   
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (unaudited)
Years
 
1
 
2
 
3
 
4
 
5
Property
 
41.1%
 
22.8%
 
13.8%
 
6.4%
 
3.4%
 
International – Casualty Business
 
                                 
At December 31, 2016
 
                                 
Total of
       
                                 
IBNR Liabilites
       
   
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance
   
Plus Expected
       
   
Years Ended December 31,
   
Development
   
Cumulative
 
   
2012
   
2013
   
2014
   
2015
   
2016
   
on Reported
   
Number of
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
         
Claims
   
Reported Claims
 
(Dollars in thousands)
                                       
2012
 
$
118,149
   
$
53,561
   
$
32,933
   
$
41,248
   
$
43,426
     
6,971
     
N/A
 
2013
           
56,371
     
38,279
     
40,297
     
52,698
     
17,310
     
N/A
 
2014
                   
55,684
     
46,674
     
66,391
     
32,996
     
N/A
 
2015
                           
53,475
     
72,931
     
48,397
     
N/A
 
2016
                                   
72,155
     
57,621
     
N/A
 
                                   
$
307,600
                 
                                                         
(Some amounts may not reconcile due to rounding.)
                                                 
 
   
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
 
   
Years Ended December 31,
 
   
2012
   
2013
   
2014
   
2015
   
2016
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
       
(Dollars in thousands)
                           
2012
 
$
7,036
   
$
10,522
   
$
16,375
   
$
19,764
   
$
22,979
 
2013
           
5,805
     
13,659
     
17,675
     
21,404
 
2014
                   
8,149
     
14,701
     
20,853
 
2015
                           
8,322
     
17,994
 
2016
                                   
10,513
 
                                   
$
93,742
 
All outstanding liabilities prior to 2012, net of reinsurance
                     
69,124
 
Liabilities for claims and claim adjustment expenses, net of reinsurance
                   
$
282,982
 
                                         
(Some amounts may not reconcile due to rounding.)
                                 
 
   
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (unaudited)
Years
 
1
 
2
 
3
 
4
 
5
Casualty
 
12.9%
 
11.7%
 
9.9%
 
7.4%
 
7.4%
 
 
International – Property Business
 
                                 
At December 31, 2016
 
                                 
Total of
       
                                 
IBNR Liabilites
       
   
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance
   
Plus Expected
       
   
Years Ended December 31,
   
Development
   
Cumulative
 
   
2012
   
2013
   
2014
   
2015
   
2016
   
on Reported
   
Number of
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
         
Claims
   
Reported Claims
 
(Dollars in thousands)
                                       
2012
 
$
270,799
   
$
253,946
   
$
206,031
   
$
209,972
   
$
204,343
     
30
     
N/A
 
2013
           
180,751
     
178,018
     
170,909
     
158,426
     
1,483
     
N/A
 
2014
                   
319,985
     
262,394
     
203,087
     
31,751
     
N/A
 
2015
                           
261,465
     
173,501
     
16,201
     
N/A
 
2016
                                   
179,737
     
54,787
     
N/A
 
                                   
$
919,094
                 
                                                         
(Some amounts may not reconcile due to rounding.)
                                                 
 
   
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
 
   
Years Ended December 31,
 
   
2012
   
2013
   
2014
   
2015
   
2016
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
       
(Dollars in thousands)
                           
2012
 
$
82,008
   
$
140,733
   
$
173,327
   
$
183,819
   
$
188,178
 
2013
           
47,180
     
99,809
     
120,790
     
135,518
 
2014
                   
58,722
     
107,116
     
137,474
 
2015
                           
56,211
     
109,416
 
2016
                                   
52,857
 
                                   
$
623,444
 
All outstanding liabilities prior to 2012, net of reinsurance
                     
100,482
 
Liabilities for claims and claim adjustment expenses, net of reinsurance
           
$
396,133
 
                                         
(Some amounts may not reconcile due to rounding.)
                                 
 
   
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (unaudited)
Years
 
1
 
2
 
3
 
4
 
5
Property
 
32.3%
 
28.8%
 
14.8%
 
7.0%
 
2.1%
 
 
Insurance – Casualty Business
 
                                 
At December 31, 2016
 
                                 
Total of
       
                                 
IBNR Liabilites
       
   
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance
   
Plus Expected
       
   
Years Ended December 31,
   
Development
   
Cumulative
 
   
2012
   
2013
   
2014
   
2015
   
2016
   
on Reported
   
Number of
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
         
Claims
   
Reported Claims
 
(Dollars in thousands)
                                       
2012
 
$
211,633
   
$
174,642
   
$
185,025
   
$
184,456
   
$
188,066
     
22,750
     
15,638
 
2013
           
255,726
     
227,745
     
230,312
     
224,374
     
57,553
     
21,168
 
2014
                   
237,459
     
238,424
     
240,318
     
69,505
     
24,829
 
2015
                           
258,299
     
258,331
     
137,267
     
25,939
 
2016
                                   
353,447
     
269,444
     
23,463
 
                                   
$
1,264,535
                 
                                                         
(Some amounts may not reconcile due to rounding.)
                                                 
 
   
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
 
   
Years Ended December 31,
 
   
2012
   
2013
   
2014
   
2015
   
2016
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
       
(Dollars in thousands) 
                           
2012
 
$
15,671
   
$
55,184
   
$
84,322
   
$
116,511
   
$
133,140
 
2013
           
17,106
     
68,516
     
101,543
     
129,619
 
2014
                   
20,357
     
71,833
     
114,055
 
2015
                           
19,916
     
67,846
 
2016
                                   
24,681
 
                                   
$
469,341
 
All outstanding liabilities prior to 2012, net of reinsurance
                     
373,822
 
Liabilities for claims and claim adjustment expenses, net of reinsurance
                   
$
1,169,016
 
                                         
(Some amounts may not reconcile due to rounding.)
                                 
 
   
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (unaudited)
Years
 
1
 
2
 
3
 
4
 
5
Casualty
 
7.7%
 
20.9%
 
16.0%
 
14.6%
 
8.8%
 
 
Insurance – Property Business
 
                                 
At December 31, 2016
 
                                 
Total of
       
                                 
IBNR Liabilites
       
   
Incurred Claims and Allocated Claim Adjustment Expenses, Net of reinsurance
   
Plus Expected
       
   
Years Ended December 31,
   
Development
   
Cumulative
 
   
2012
   
2013
   
2014
   
2015
   
2016
   
on Reported
   
Number of
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
         
Claims
   
Reported Claims
 
(Dollars in thousands) 
                                       
2012
 
$
58,245
   
$
46,862
   
$
43,478
   
$
44,807
   
$
44,235
     
23
     
N/A
 
2013
           
63,807
     
56,751
     
51,988
     
52,696
     
1
     
N/A
 
2014
                   
67,972
     
69,718
     
67,314
     
477
     
N/A
 
2015
                           
80,203
     
75,707
     
1,950
     
N/A
 
2016
                                   
150,924
     
46,592
     
N/A
 
                                   
$
390,876
                 
                                                         
(Some amounts may not reconcile due to rounding.)
                                                 
 
   
Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance
 
   
Years Ended December 31,
 
   
2012
   
2013
   
2014
   
2015
   
2016
 
Accident Year
 
(unaudited)
   
(unaudited)
   
(unaudited)
   
(unaudited)
       
(Dollars in thousands)
                           
2012
 
$
26,853
   
$
44,352
   
$
42,807
   
$
44,459
   
$
44,169
 
2013
           
35,162
     
54,060
     
52,417
     
52,680
 
2014
                   
40,218
     
66,316
     
66,476
 
2015
                           
45,264
     
70,156
 
2016
                                   
71,647
 
                                   
$
305,129
 
All outstanding liabilities prior to 2012, net of reinsurance
                     
146
 
Liabilities for claims and claim adjustment expenses, net of reinsurance
                   
$
85,893
 
                                         
(Some amounts may not reconcile due to rounding.)
                                 
 
   
Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance (unaudited)
Years
 
1
 
2
 
3
 
4
 
5
Property
 
56.1%
 
36.4%
 
-1.8%
 
2.0%
 
-0.7%


 
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid Claims and Claim Adjustment Expenses

The reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expenses in the consolidated statement of financial position is as follows.
 
   
December 31, 2016
(Dollars in thousands)
     
Net outstanding liabilities
     
U.S. Reinsurance Casualty
 
$
1,517,775
 
U.S. Reinsurance Property
   
536,448
 
International Casualty
   
282,982
 
International Property
   
396,133
 
Insurance Casualty
   
1,169,016
 
Insurance Property
   
85,893
 
Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance
   
3,988,248
 
         
Reinsurance recoverable on unpaid claims
       
U.S. Reinsurance Casualty
   
958,001
 
U.S. Reinsurance Property
   
731,331
 
International Casualty
   
456,106
 
International Property
   
567,074
 
Insurance Casualty
   
1,398,275
 
Insurance Property
   
89,005
 
Total reinsurance recoverable on unpaid claims
   
4,199,791
 
         
Insurance lines other than short-duration
   
-
 
Unallocated claims adjustment expenses
   
110,022
 
Other
   
33,227
 
     
143,249
 
         
Total gross liability for unpaid claims and claim adjustment expense
 
$
8,331,288
 
         
(Some amounts may not reconcile due to rounding.)
       
 
Reserving Methodology

The Company maintains reserves equal to our estimated ultimate liability for losses and loss adjustment expense (LAE) for reported and unreported claims for our insurance and reinsurance businesses.  Because reserves are based on estimates of ultimate losses and LAE by underwriting or accident year, the Company uses a variety of statistical and actuarial techniques to monitor reserve adequacy over time, evaluate new information as it becomes known, and adjust reserves whenever an adjustment appears warranted.  The Company considers many factors when setting reserves including:  (1) exposure base and projected ultimate premium; (2) expected loss ratios by product and class of business, which are developed collaboratively by underwriters and actuaries; (3) actuarial methodologies which analyze loss reporting and payment experience, reports from ceding companies and historical trends, such as reserving patterns, loss payments, and product mix; (4) current legal interpretations of coverage and liability; and (5) economic conditions.  Insurance and reinsurance loss and LAE reserves represent the Company's best estimate of its ultimate liability.  Actual loss and LAE ultimately paid may deviate, perhaps substantially, from such reserves.  Net income (gain or loss) will be impacted in a period in which the change in estimated ultimate loss and LAE is recorded.

The detailed data required to evaluate ultimate losses for the Company's insurance business is accumulated from its underwriting and claim systems.  Reserving for reinsurance requires evaluation of loss information received from ceding companies.  Ceding companies report losses in many forms depending on the type of contract and the agreed or contractual reporting requirements.  Generally, pro rata contracts require the submission of a monthly/quarterly account, which includes premium and loss activity for the period with corresponding reserves as established by the ceding company.  This information is recorded into the Company's records.  For certain pro rata contracts, the Company may require a detailed loss report for claims that exceed a certain dollar threshold or relate to a particular type of loss.  Excess of loss and facultative contracts generally require individual loss reporting with precautionary notices provided when a loss reaches a significant percentage of the attachment point of the contract or when certain causes of loss or types of injury occur.  Experienced claims staff handles individual loss reports and supporting claim information.  Based on evaluation of a claim, the Company may establish additional case reserves in addition to the case reserves reported by the ceding company.  To ensure ceding companies are submitting required and accurate data, Everest's Underwriting, Claim, Reinsurance Accounting, and Internal Audit Departments perform various reviews of ceding companies, particularly larger ceding companies, including on-site audits.

The Company segments both reinsurance and insurance reserves into exposure groupings for actuarial analysis.  The Company assigns business to exposure groupings so that the underlying exposures have reasonably homogeneous loss development characteristics and are large enough to facilitate credible estimation of ultimate losses.  The Company periodically reviews its exposure groupings and may change groupings over time as business changes.  The Company currently uses approximately 150 exposure groupings to develop reserve estimates.  One of the key selection characteristics for the exposure groupings is the historical duration of the claims settlement process.  Business in which claims are reported and settled relatively quickly are commonly referred to as short tail lines, principally property lines.  On the other hand, casualty claims tend to take longer to be reported and settled and casualty lines are generally referred to as long tail lines. Estimates of ultimate losses for shorter tail lines, with the exception of loss estimates for large catastrophic events, generally exhibit less volatility than those for the longer tail lines.

The Company uses a variety of actuarial methodologies, such as the expected loss ratio method, chain ladder methods, and Bornhuetter-Ferguson methods, supplemented by judgment where appropriate, to estimate ultimate loss and LAE for each exposure group.

Expected Loss Ratio Method:  The expected loss ratio method uses earned premium times an expected loss ratio to calculate ultimate losses for a given underwriting or accident year.  This method relies entirely on expectation to project ultimate losses with no consideration given to actual losses.  As such, it may be appropriate for an immature underwriting or accident year where few, if any, losses have been reported or paid, but less appropriate for a more mature year.

Chain Ladder Method:  Chain ladder methods use a standard loss development triangle to project ultimate losses.  Age-to-age development factors are selected for each development period and combined to calculate age-to-ultimate development factors which are then applied to paid or reported losses to project ultimate losses.  This method relies entirely on actual paid or reported losses to project ultimate losses.  No other factors such as changes in pricing or other expectations are taken into account.  It is most appropriate for groups with homogeneous, stable experience where past development patterns are expected to continue in the future.  It is least appropriate for groups which have changed significantly over time or which are more volatile.

Bornhuetter-Ferguson Method:  The Bornhuetter-Ferguson method is a combination of the expected loss ratio method and the chain ladder method.  Ultimate losses are projected based partly on actual paid or reported losses and partly on expectation.  Incurred but not reported (IBNR) reserves are calculated using earned premium, an a priori loss ratio, and selected age-to-age development factors and added to actual reported (paid) losses to determine ultimate losses.  It is more responsive to actual reported or paid development than the expected loss ratio method but less responsive than the chain ladder method.  The reliability of the method depends on the accuracy of the selected a priori loss ratio.

Although the Company uses similar actuarial methods for both short tail and long tail lines, the faster reporting of experience for the short tail lines allows the Company to have greater confidence in its estimates of ultimate losses for short tail lines at an earlier stage than for long tail lines.  As a result, the Company utilizes, as well, exposure-based methods to estimate its ultimate losses for longer tail lines, especially for immature underwriting or accident years.  For both short and long tail lines, the Company supplements these general approaches with analytically based judgments.
 
Key actuarial assumptions contain no explicit provisions for reserve uncertainty nor does the Company supplement the actuarially determined reserves for uncertainty.

Carried reserves at each reporting date are the Company's best estimate of ultimate unpaid losses and LAE at that date.  The Company completes detailed reserve studies for each exposure group annually for both reinsurance and insurance operations.  The completed annual reserve studies are "rolled-forward" for each accounting period until the subsequent reserve study is completed.  Analyzing the roll-forward process involves comparing actual reported losses to expected losses based on the most recent reserve study.  The Company analyzes significant variances between actual and expected losses and post adjustments to its reserves as warranted.

The Company continues to receive claims under expired insurance and reinsurance contracts asserting injuries and/or damages relating to or resulting from environmental pollution and hazardous substances, including asbestos.  Environmental claims typically assert liability for (a) the mitigation or remediation of environmental contamination or (b) bodily injury or property damage caused by the release of hazardous substances into the land, air or water.  Asbestos claims typically assert liability for bodily injury from exposure to asbestos or for property damage resulting from asbestos or products containing asbestos.

The Company's reserves include an estimate of the Company's ultimate liability for A&E claims.  The Company's A&E liabilities emanate from direct insurance business and Everest Re's assumed reinsurance business.  All of the contracts of insurance and reinsurance under which the Company has received claims during the past three years, expired more than 20 years ago.  There are significant uncertainties surrounding the Company's reserves for its A&E losses.

A&E exposures represent a separate exposure group for monitoring and evaluating reserve adequacy. The following table summarizes incurred losses with respect to A&E reserves on both a gross and net of reinsurance basis for the periods indicated:
 
   
At December 31,
 
(Dollars in thousands)
 
2016
   
2015
   
2014
 
Gross basis:
                 
Beginning of period reserves
 
$
433,117
   
$
476,205
   
$
402,461
 
Incurred losses
   
73,336
     
40,000
     
142,233
 
Paid losses
   
(65,342
)
   
(83,088
)
   
(68,490
)
End of period reserves
 
$
441,111
   
$
433,117
   
$
476,205
 
                         
Net basis:
                       
Beginning of period reserves
 
$
276,540
   
$
304,286
   
$
269,370
 
Incurred losses
   
45,668
     
30,879
     
87,362
 
Paid losses
   
(47,798
)
   
(58,625
)
   
(52,446
)
End of period reserves
 
$
274,409
   
$
276,540
   
$
304,286
 
                         
(Some amounts may not reconcile due to rounding.)
                       
 
On July 13, 2015, the Company closed its agreement to sell all of the outstanding shares of capital stock of Mt. McKinley, a Delaware domiciled insurance company and wholly-owned subsidiary of the Company to Clearwater Insurance Company, a Delaware domiciled insurance company.  The purchase price of $20,156 thousand was based upon the statutory book value of Mt. McKinley as of the closing date. The Company recognized a pre-tax realized gain of $94,704 thousand on the sale of Mt. McKinley.

Reinsurance Receivables.  Reinsurance receivables for both paid and unpaid losses totaled $4,573,787 thousand and $4,459,087 thousand at December 31, 2016 and 2015, respectively. At December 31, 2016, $3,651,720 thousand, or 79.8%, was receivable from Everest Reinsurance (Bermuda), Ltd. ("Bermuda Re"), an affiliated entity, and is fully collateralized by a trust agreement.  No other retrocessionaire accounted for more than 5% of reinsurance receivables.