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Reserves for Unpaid Losses and Loss Adjustment Expenses | 12 Months Ended
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Dec. 31, 2015
Insurance Loss Reserves [Abstract] |
Reserves for Unpaid Losses and Loss Adjustment Expenses | Reserves for Unpaid Losses and Loss Adjustment Expenses Insurance Operations White Mountains establishes loss and LAE reserves that are estimates of amounts needed to pay claims and related expenses in the future for insured events that have already occurred. The process of estimating reserves involves a considerable degree of judgment by management and, as of any given date, is inherently uncertain. Loss and LAE reserves are typically comprised of (1) case reserves for claims reported and (2) reserves for losses that have occurred but for which claims have not yet been reported, referred to as incurred but not reported (“IBNR”) reserves, which include a provision for expected future development on case reserves. Case reserves are estimated based on the experience and knowledge of claims staff regarding the nature and potential cost of each claim and are adjusted as additional information becomes known or payments are made. IBNR reserves are typically derived by subtracting paid loss and LAE and case reserves from estimates of ultimate loss and LAE. Actuaries estimate ultimate loss and LAE using various generally accepted actuarial methods applied to known losses and other relevant information. Like case reserves, IBNR reserves are adjusted as additional information becomes known or payments are made. Ultimate loss and LAE are generally determined by extrapolation of claim emergence and settlement patterns observed in the past that can reasonably be expected to persist into the future. In forecasting ultimate loss and LAE with respect to any line of business, past experience with respect to that line of business is the primary resource, but cannot be relied upon in isolation. White Mountains’s own experience, particularly claims development experience, such as trends in case reserves, payments on and closings of claims, as well as changes in business mix and coverage limits, is the most important information for estimating its reserves. External data, available from organizations such as statistical bureaus, consulting firms and reinsurance companies, is sometimes used to supplement or corroborate White Mountains’s own experience. External data can be especially useful for estimating costs on new lines of business. Ultimate loss and LAE for major losses and catastrophes are estimated based on the known and expected exposures to the loss event, rather than simply relying on the extrapolation of reported and settled claims. For some lines of business, such as “long-tail” coverages discussed below, claims data reported in the most recent accident or report year is often too limited to provide a meaningful basis for analysis due to the typical delay in reporting and settling of claims. For this type of business, White Mountains uses an expected loss ratio method for the initial accident year or years. This is a standard and accepted actuarial reserve estimation method in these circumstances in which the loss ratio is selected based upon information used in pricing policies for that line of business, as well as any publicly available industry data, such as industry pricing, experience and trends, for that line of business. Uncertainties in estimating ultimate loss and LAE are magnified by the time lag between when a claim actually occurs and when it is reported and eventually settled. This time lag is sometimes referred to as the “claim-tail”. The claim-tail for most property coverages is typically short (usually a few days up to a few months). The claim-tail for liability/casualty coverages, such as automobile liability, general liability, products liability, multiple peril coverage, and workers compensation, can be especially long as claims are often reported and ultimately paid or settled years, even decades, after the related loss events occur. During the long claims reporting and settlement period, additional facts regarding coverages written in prior accident years, as well as about actual claims and trends may become known and, as a result, White Mountains may adjust its reserves. If management determines that an adjustment is appropriate, the adjustment is booked in the accounting period in which such determination is made in accordance with GAAP. Accordingly, should reserves need to be increased or decreased in the future from amounts currently established, future results of operations would be negatively or positively impacted, respectively. In determining ultimate loss and LAE, the cost to indemnify claimants, provide needed legal defense and other services for insureds and administer the investigation and adjustment of claims are considered. These claim costs are influenced by many factors that change over time, such as expanded coverage definitions as a result of new court decisions, inflation in costs to repair or replace damaged property, inflation in the cost of medical services and legislated changes in statutory benefits, as well as by the particular, unique facts that pertain to each claim. As a result, the rate at which claims arose in the past and the costs to settle them may not always be representative of what will occur in the future. The factors influencing changes in claim costs are often difficult to isolate or quantify and developments in paid and incurred losses from historical trends are frequently subject to multiple and conflicting interpretations. Changes in coverage terms or claims handling practices may also cause future experience and/or development patterns to vary from the past. A key objective of actuaries in developing estimates of ultimate loss and LAE, and resulting IBNR reserves, is to identify aberrations and systemic changes occurring within historical experience and accurately adjust for them so that the future can be projected reliably. Because of the factors previously discussed, this process requires the use of informed judgment and is inherently uncertain. White Mountains’s actuaries use several generally accepted actuarial methods to evaluate its loss reserves, each of which has its own strengths and weaknesses. Management places more or less reliance on a particular method based on the facts and circumstances at the time the reserve estimates are made. These methods generally fall into one of the following categories or are hybrids of one or more of the following categories:
• | Historical paid loss development methods: These methods use historical loss payments over discrete periods of time to estimate future losses. Historical paid loss development methods assume that the ratio of losses paid in one period to losses paid in an earlier period will remain constant. These methods necessarily assume that factors that have affected paid losses in the past, such as inflation or the effects of litigation, will remain constant in the future. Because historical paid loss development methods do not use case reserves to estimate ultimate losses, they can be more reliable than the other methods discussed below that look to case reserves (such as actuarial methods that use incurred losses) in situations where there are significant changes in how case reserves are established by a company’s claims adjusters. However, historical paid loss development methods are more leveraged, meaning that small changes in payments have a larger impact on estimates of ultimate losses, than actuarial methods that use incurred losses because cumulative loss payments take much longer to equal the expected ultimate losses than cumulative incurred amounts. In addition, and for similar reasons, historical paid loss development methods are often slow to react to situations when new or different factors arise than those that have affected paid losses in the past.
• | Historical incurred loss development methods: These methods, like historical paid loss development methods, assume that the ratio of losses in one period to losses in an earlier period will remain constant in the future. However, instead of using paid losses, these methods use incurred losses (i.e., the sum of cumulative historical loss payments plus outstanding case reserves) over discrete periods of time to estimate future losses. Historical incurred loss development methods can be preferable to historical paid loss development methods because they explicitly take into account open cases and the claims adjusters’ evaluations of the cost to settle all known claims. However, historical incurred loss development methods necessarily assume that case reserving practices are consistently applied over time. Therefore, when there have been significant changes in how case reserves are established, using incurred loss data to project ultimate losses can be less reliable than other methods.
• | Expected loss ratio methods: These methods are based on the assumption that ultimate losses vary proportionately with premiums. Expected loss ratios are typically developed based upon the information used in pricing, and are multiplied by the total amount of premiums earned to calculate ultimate losses. Expected loss ratio methods are useful for estimating ultimate losses in the early years of long-tailed lines of business, when little or no paid or incurred loss information is available.
• | Adjusted historical paid and incurred loss development methods: These methods take traditional historical paid and incurred loss development methods and adjust them for the estimated impact of changes from the past in factors such as inflation, the speed of claim payments or the adequacy of case reserves. Adjusted historical paid and incurred loss development methods are often more reliable methods of predicting ultimate losses in periods of significant change, provided the actuaries can develop methods to reasonably quantify the impact of changes.
White Mountains performs an actuarial review of its recorded reserves each quarter. White Mountains’s actuaries compare the previous quarter’s estimates of paid loss and LAE, case reserves and IBNR to amounts indicated by actual experience. Differences between previous estimates and actual experience are evaluated to determine whether a given actuarial method for estimating loss and LAE should be relied upon to a greater or lesser extent than it had been in the past. While some variance is expected each quarter due to the inherent uncertainty in loss and LAE, persistent or large variances would indicate that prior assumptions and/or reliance on certain reserving methods may need to be revised going forward. Upon completion of each quarterly review, White Mountains’s actuaries select indicated reserve levels based on the results of the actuarial methods described previously, which are the primary consideration in determining management's best estimate of required reserves. However, in making its best estimate, management also considers other qualitative factors that may lead to a difference between held reserves and actuarially indicated reserves levels in the future. Typically, these factors exist when management and our actuaries conclude that there is insufficient historical incurred and paid loss information or that trends included in the historical incurred and paid loss information are unlikely to repeat in the future. Such factors include, among others, recent entry into new markets or new products, improvements in the claims department that are expected to lessen future ultimate loss costs, legal and regulatory developments, or other volatilities that may arise. Loss and Loss Adjustment Expense Reserve Summary The following table summarizes the loss and LAE reserve activities of White Mountains’s insurance subsidiaries for the years ended December 31, 2015, 2014 and 2013:
|  | Year Ended December 31,
Millions |  | 2015 |  | 2014 |  | 2013
Gross beginning balance |  | $ | 1,350.0 |  |  | $ | 1,054.3 |  |  | $ | 1,000.0 |
Less beginning reinsurance recoverable on unpaid losses |  | (161.7 | ) |  | (80.2 | ) |  | (107.3 | )
Net loss and LAE reserves |  | 1,188.3 |  |  | 974.1 |  |  | 892.7 |
Loss and LAE reserves consolidated — SSIE |  | — |  |  | 13.6 |  |  | — |
Losses and LAE incurred relating to: |  |  |  |  |  |
Current year losses |  | 712.9 |  |  | 732.0 |  |  | 622.1 |
Prior year losses |  | (4.0 | ) |  | 92.0 |  |  | — |
Total incurred losses and LAE |  | 708.9 |  |  | 824.0 |  |  | 622.1 |
Loss and LAE paid relating to: |  |  |  |  |  |  |  |  |
Current year losses |  | (208.8 | ) |  | (202.6 | ) |  | (188.6 | )
Prior year losses |  | (479.1 | ) |  | (420.8 | ) |  | (352.1 | )
Total loss and LAE payments |  | (687.9 | ) |  | (623.4 | ) |  | (540.7 | )
Net ending balance |  | 1,209.3 |  |  | 1,188.3 |  |  | 974.1 |
Plus ending reinsurance recoverable on unpaid losses |  | 186.5 |  |  | 161.7 |  |  | 80.2 |
Gross ending balance |  | $ | 1,395.8 |  |  | $ | 1,350.0 |  |  | $ | 1,054.3 |
Loss and LAE development —2015 During the year ended December 31, 2015, White Mountains experienced $4.0 million of net favorable loss reserve development, which consisted of $1.8 million of net favorable loss reserve development at OneBeacon and $2.2 million of net favorable loss reserve development at SSIE. The OneBeacon net favorable loss reserve development was primarily attributable to favorable loss reserve development from the Technology, Collector Cars and Boats, Specialty Property and Financial Services lines of business, offset by unfavorable net loss reserve development from the Entertainment and Ocean Marine lines of business. Loss and LAE development —2014 During the year ended December 31, 2014, White Mountains experienced $92.0 million of net unfavorable loss reserve development, which consisted of $89.8 million of net unfavorable loss reserve development at OneBeacon, of which $75.5 million related to the 2014 fourth quarter reserve increase described below, and $2.2 million of net unfavorable loss reserve development at SSIE. OneBeacon 2014 Fourth Quarter Loss and LAE Reserve Increase Through the first nine months of 2014, OneBeacon recorded $14.3 million of unfavorable loss and LAE reserve development, driven by greater-than-expected large losses in several underwriting units, primarily in the professional and management liability lines within Professional Insurance. In 2015, Professional Insurance was reorganized into Other Professional Lines, Management Liability, Financial Services and Healthcare. This large loss activity, which occurred mostly during the second and third quarters of 2014, also impacted the current accident year loss and LAE estimates. Additionally, OneBeacon incurred higher-than-usual claim coverage determination costs, a component of LAE expenses, during the first nine months of 2014. Other underwriting units also reported increased claim activity, including the Entertainment, Government Risks, and Accident underwriting units. Since the increased level of loss and LAE activity continued into the early part of the fourth quarter of 2014, the high level of activity in the second and third quarters no longer seemed to be isolated occurrences. As such, during the fourth quarter of 2014, OneBeacon enhanced its actuarial and claims review in several areas. OneBeacon isolated the recent large loss activity in each of its underwriting units and examined the emergence of large losses relative to the timing and amounts of expected large losses. OneBeacon also conducted additional analyses in the lawyers’ professional liability line within Professional Insurance. These new analyses included a claim level review and the application of additional actuarial methods and loss development assumptions. The results of these analyses indicated that the assumed tail risk included in the loss development patterns used to record IBNR reserves for this line were insufficient and needed to be increased for remaining long-tail exposures. OneBeacon’s claims and actuarial staff also conducted an in-depth review of coverage determination, litigation and other claim-specific adjusting expenses as a result of an emerging trend of increased expenses in these areas over recent quarters, particularly coverage determination expenses. This review concluded that the ultimate costs of these loss adjustment expenses were larger than previously estimated, causing management to record an increase in estimated LAE expenses, primarily in Professional Insurance. Finally, OneBeacon also recorded unfavorable prior year development in other underwriting units, including Entertainment and Government Risks. The unfavorable loss development in Entertainment and Government Risks resulted from heavier than expected claim activity during the fourth quarter, predominantly in the general liability and commercial auto liability lines. In order to fully reflect these recent trends, OneBeacon recorded a $109.2 million increase in loss and LAE reserves, which included a $75.5 million increase in prior accident year loss and LAE reserves and a $33.7 million increase in the current accident year loss and LAE reserves recorded at September 30, 2014. The components of the 2014 fourth quarter loss and LAE reserve increase and the net loss and LAE development for the full year are provided below:
Underwriting Unit |  | 2014 Fourth Quarter Reserve Increases |  | Full Year 2014
Millions |  | Current Accident Year |  | Prior Accident Year |  | Total |  | Net Prior Year Development
Professional Insurance |  | $ | 22.9 |  |  | $ | 46.4 |  |  | $ | 69.3 |  |  | $ | 59.1 |
Specialty Property |  | (1.1 | ) |  | 5.7 |  |  | 4.6 |  |  | 1.1 |
Crop |  | 3.8 |  |  | — |  |  | 3.8 |  |  | — |
Other |  | 2.8 |  |  | (.4 | ) |  | 2.4 |  |  | 1.6 |
Specialty Products |  | 28.4 |  |  | 51.7 |  |  | 80.1 |  |  | 61.8 |
Entertainment |  | 1.5 |  |  | 11.6 |  |  | 13.1 |  |  | 13.5 |
Accident |  | — |  |  | 3.5 |  |  | 3.5 |  |  | 6.0 |
Government Risks |  | 1.2 |  |  | 7.1 |  |  | 8.3 |  |  | 8.5 |
Other |  | 2.6 |  |  | 1.6 |  |  | 4.2 |  |  | — |
Specialty Industries |  | 5.3 |  |  | 23.8 |  |  | 29.1 |  |  | 28.0 |
Total |  | $ | 33.7 |  |  | $ | 75.5 |  |  | $ | 109.2 |  |  | $ | 89.8 |
As noted above, OneBeacon increased its provision for current accident year losses and LAE by $33.7 million in the fourth quarter of 2014. In making its loss and LAE reserve picks for the 2014 accident year, OneBeacon considered the results of the enhanced actuarial and claim review and the fact that reported large claims were approaching estimated ultimate held reserves for large losses sooner than originally expected. $3.8 million of the increase is related to higher-than-expected reports of crop losses that emerged in the fourth quarter. The remaining $29.9 million of the increase reflects an increase in management’s best estimate of current losses and LAE as of December 31, 2014 from those recorded in the first nine months of 2014. This increase primarily affected the Professional Insurance underwriting unit, which represented $22.9 million of the total provision. Loss and LAE development —2013 During the year ended December 31, 2013, White Mountains experienced no net loss and LAE reserve development on prior accident year reserves. OneBeacon experienced favorable development in its other liability and ocean marine lines, which was offset by unfavorable development primarily related to property, general liability and accident and health lines.

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- Definition The entire disclosure for liabilities related to future policy benefits and unpaid claims and claim adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6482852&loc=d3e14931-158439 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14754-158437 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.13(a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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