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Fair Value Measurements
3 Months Ended
Mar. 31, 2024
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
Recurring fair value measurements
The following describes the valuation methodologies generally used by the independent pricing sources, or by us, to measure financial instruments at fair value, including the general classification of such financial instruments pursuant to the valuation hierarchy.

Fixed income securities:
U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies: Securities with valuations derived from quoted prices for identical instruments in active markets that we can access are categorized in Level 1 of the fair value hierarchy. Securities valued by surveying the dealer community, obtaining relevant trade data, benchmark quotes and spreads and incorporating this information in the valuation process are categorized as Level 2 of the fair value hierarchy.
Corporate Debt Securities are valued by obtaining relevant trade data, benchmark quotes and spreads and broker/dealer quotes and incorporating this information into the valuation process. These securities are generally categorized in Level 2 of the fair value hierarchy.
Obligations of U.S. States & Political Subdivisions are valued by tracking, capturing, and analyzing quotes for active issues and trades reported via the Municipal Securities Rulemaking Board records. Daily briefings and reviews of current economic conditions, trading levels, spread relationships, and the slope of the yield curve provide further data for evaluation. These securities are generally categorized in Level 2 of the fair value hierarchy.
Residential Mortgage-Backed Securities ("RMBS") are valued by monitoring interest rate movements, and other pertinent data daily. Incoming market data is enriched to derive spread, yield and/or price data as appropriate, enabling known data points to be extrapolated for valuation application across a range of related securities. These securities are generally categorized in Level 2 of the fair value hierarchy.
Commercial Mortgage-Backed Securities ("CMBS") are valued using techniques that reflect market participants’ assumptions and maximize the use of relevant observable inputs including quoted prices for similar assets, benchmark yield curves and market corroborated inputs. Evaluation uses regular reviews of the inputs for securities covered, including executed trades, broker quotes, credit information, collateral attributes and/or cash flow waterfall as applicable. These securities are generally categorized in Level 2 of the fair value hierarchy.
Asset-Backed Securities ("ABS") are valued using spreads and other information solicited from market buy-and-sell-side sources, including primary and secondary dealers, portfolio managers, and research analysts. Cash flows are generated for each tranche, benchmark yields are determined, and deal collateral performance and tranche level attributes including trade activity, bids, and offers are applied, resulting in tranche specific prices. These securities are generally categorized in Level 2 of the fair value hierarchy.
Collateralized loan obligations ("CLOs") are valued by evaluating manager rating, seniority in the capital structure, assumptions about prepayment, default and recovery and their impact on cash flow generation. Loan level net asset values are determined and aggregated for tranches and as a final step prices are checked against available recent trade activity. These securities are generally categorized in Level 2 of the fair value hierarchy.
Foreign government debt is valued by surveying the dealer community, obtaining relevant trade data, benchmark quotes and spreads and incorporating this information into the valuation process. These securities are generally categorized in Level 2 of the fair value hierarchy.
Commercial Paper, which has an original maturity greater than 90 days, is valued using market data for comparable instruments of similar maturity and average yields. These securities are generally categorized in Level 2 of the fair value hierarchy.
Equity securities: Consist of actively traded, exchange-listed equity securities, including exchange traded funds (“ETFs”) and Bond Mutual Funds, with valuations derived from quoted prices for identical assets in active markets that we can access. These securities are valued in Level 1 of the fair value hierarchy.
Cash Equivalents: Consist of money market funds and treasury bills with valuations derived from quoted prices for identical assets in active markets that we can access. These securities are valued in level 1 of the fair value hierarchy. Instruments in this category valued using market data for comparable instruments are classified as level 2 in the fair value hierarchy.
Assets measured at fair value, by hierarchy level, as of March 31, 2024 and December 31, 2023 are shown in tables 8.1a and 8.1b below. The fair value of the assets is estimated using the process described above, and more fully in Note 3 - “Significant Accounting Policies” to the consolidated financial statements in our 2023 Annual Report on Form 10-K.
Assets carried at fair value by hierarchy level as of March 31, 2024
Table8.1a
(In thousands)Total Fair Value
Quoted Prices in Active Markets for Identical Assets
(Level 1)
Significant Other Observable Inputs
(Level 2)
U.S. Treasury securities and obligations of U.S. government corporations and agencies$140,912 $98,412 $42,500 
Obligations of U.S. states and political subdivisions1,891,612 — 1,891,612 
Corporate debt securities2,526,361 — 2,526,361 
ABS172,516 — 172,516 
RMBS323,826 — 323,826 
CMBS272,378 — 272,378 
CLOs318,616 — 318,616 
Foreign government debt3,746 — 3,746 
Commercial paper22,747 — 22,747 
Total fixed income securities5,672,714 98,412 5,574,302 
Equity securities14,697 14,697 — 
Cash equivalents (1)
434,990 424,383 10,607 
Total$6,122,401 $537,492 $5,584,909 
Assets carried at fair value by hierarchy level as of December 31, 2023
Table8.1b
(In thousands)Total Fair Value
Quoted Prices in Active Markets for Identical Assets
(Level 1)
Significant Other Observable Inputs
(Level 2)
U.S. Treasury securities and obligations of U.S. government corporations and agencies$161,682 $95,828 $65,854 
Obligations of U.S. states and political subdivisions1,908,078 — 1,908,078 
Corporate debt securities2,515,581 — 2,515,581 
ABS171,273 — 171,273 
RMBS330,773 — 330,773 
CMBS277,457 — 277,457 
CLOs326,096 — 326,096 
Foreign government debt3,843 — 3,843 
Commercial paper28,330 — 28,330 
Total fixed income securities5,723,113 95,828 5,627,285 
Equity securities14,771 14,771 — 
Cash equivalents (1)
367,517 367,301 216 
Total$6,105,401 $477,900 $5,627,501 
(1) Includes restricted cash equivalents
Certain financial instruments, including insurance contracts, are excluded from these fair value disclosure requirements. Additional fair value disclosures related to our investment portfolio are included in Note 7 – “Investments.”

In addition to the assets carried at fair value discussed above, we have embedded derivatives carried at fair value related to our Home Re Transactions that are classified as “Other liabilities” or “Other assets” in our consolidated balance sheets. The estimated fair value related to our embedded derivatives reflects the present value impact of the variation in investment income on the assets held by the reinsurance trusts and the contractual reference rate on the Home Re Transactions used to calculate the reinsurance premiums we estimate we will pay over the estimated remaining life. These liabilities or assets are categorized in Level 3 of the fair value hierarchy. At March 31, 2024 and December 31, 2023, the fair value of the embedded derivatives was a liability of $0.6 million and an asset of $2.4 million, respectively. (See Note 4 - "Reinsurance" for more information about our reinsurance programs.)

Real estate acquired through claim settlement is carried at fair values and is reported in “Other assets” on the consolidated balance sheet. These assets are categorized as Level 3 of the fair value hierarchy. For the three months ended March 31, 2024, and 2023, purchases of real estate acquired were $1.0 million and $0.1 million, respectively. For the three months ended March 31, 2024, and 2023, sales of real estate acquired were zero and $1.2 million, respectively.
Financial assets and liabilities not measured at fair value
Other invested assets include an investment in FHLB stock that is carried at cost, which due to restrictions that require it to be redeemed or sold only to the security issuer at par value, approximates fair value. The fair value of other invested assets is categorized as Level 2.
Financial liabilities include our outstanding debt obligations. The fair value of our 5.25% Notes was based on observable market prices and is categorized as level 2.
Table 8.2 presents the carrying value and fair value of our financial assets and liabilities disclosed, but not carried, at fair value at March 31, 2024 and December 31, 2023.
Financial assets and liabilities not measured at fair value
Table8.2
March 31, 2024December 31, 2023
(In thousands)Carrying ValueFair ValueCarrying ValueFair Value
Financial assets
Other invested assets$850 $850 $850 $850 
Financial liabilities
5.25% Senior Notes643,563 633,373 643,196 634,498