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Fair Value Of Financial Instruments
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Of Financial Instruments Fair Value Measurements
The Company’s fixed maturity and equity securities classified as available for sale and its trading account securities are carried at fair value. Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date”. The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels, as follows:
Level 1 - Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.  
Level 2 - Quoted prices for similar assets or valuations based on inputs that are observable.     
Level 3 - Estimates of fair value based on internal pricing methodologies using unobservable inputs. Unobservable inputs are only used to measure fair value to the extent that observable inputs are not available.
Substantially all of the Company’s fixed maturity securities were priced by independent pricing services. The prices provided by the independent pricing services are estimated based on observable market data in active markets utilizing pricing models and processes, which may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, sector groupings, matrix pricing and reference data. The pricing services may prioritize inputs differently on any given day for any security based on market conditions, and not all inputs are available for each security evaluation on any given day. The pricing services used by the Company have indicated that they will only produce an estimate of fair value if objectively verifiable information is available. The determination of whether markets are active or inactive is based upon the volume and level of activity for a particular asset class. The Company reviews the prices provided by pricing services for reasonableness and periodically performs independent price tests of a sample of securities to ensure proper valuation.
If prices from independent pricing services are not available for fixed maturity securities, the Company estimates the fair value. For Level 2 securities, the Company utilizes pricing models and processes which may include benchmark yields, sector groupings, matrix pricing, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, bids, offers and reference data. Where broker quotes are used, the Company generally requests two or more quotes and sets a price within the range of quotes received based on its assessment of the credibility of the quote and its own evaluation of the security. The Company generally does not adjust quotes received from brokers. For securities traded only in private negotiations, the Company determines fair value based primarily on the cost of such securities, which is adjusted to reflect prices of recent placements of securities of the same issuer, financial projections, credit quality and business developments of the issuer and other relevant information.
For Level 3 securities, the Company generally uses a discounted cash flow model to estimate the fair value of fixed maturity securities. The cash flow models are based upon assumptions as to prevailing credit spreads, interest rate and interest rate volatility, time to maturity and subordination levels. Projected cash flows are discounted at rates that are adjusted to reflect illiquidity, where appropriate.
The following tables present the assets and liabilities measured at fair value as of December 31, 2023 and 2022 by level:
(In thousands)TotalLevel 1Level 2Level 3
December 31, 2023    
Assets:    
Fixed maturity securities available for sale:   
U.S. government and government agency$1,716,731 $— $1,716,731 $— 
State and municipal2,634,422 — 2,634,422 — 
Mortgage-backed securities2,266,455 — 2,266,455 — 
Asset-backed securities4,187,040 — 4,187,040 — 
Corporate7,654,059 — 7,654,059 — 
Foreign government1,666,229 — 1,666,229 — 
Total fixed maturity securities available for sale20,124,936 — 20,124,936 — 
Equity securities:    
Common stocks838,054 835,338 1,158 1,558 
Preferred stocks252,293 — 248,598 3,695 
Total equity securities1,090,347 835,338 249,756 5,253 
Arbitrage trading account938,049 546,110 388,167 3,772 
Total$22,153,332 $1,381,448 $20,762,859 $9,025 
Liabilities:    
Trading account securities sold but not yet purchased$9,357 $9,357 $— $— 
December 31, 2022    
Assets:    
Fixed maturity securities available for sale:   
U.S. government and government agency$892,258 $— $892,258 $— 
State and municipal2,890,098 — 2,890,098 — 
Mortgage-backed securities1,665,410 — 1,665,410 — 
Asset-backed securities3,982,773 — 3,982,773 — 
Corporate6,703,992 — 6,703,992 — 
Foreign government1,401,522 — 1,401,522 — 
Total fixed maturity securities available for sale17,536,053 — 17,536,053 — 
Equity securities:    
Common stocks982,751 978,991 1,161 2,599 
Preferred stocks203,143 — 191,844 11,299 
Total equity securities1,185,894 978,991 193,005 13,898 
Arbitrage trading account944,230 822,192 118,448 3,590 
Total$19,666,177 $1,801,183 $17,847,506 $17,488 
Liabilities:    
Trading account securities sold but not yet purchased$— $— $— $— 
The following tables summarize changes in Level 3 assets and liabilities for the years ended December 31, 2023 and 2022:
 Gains (Losses) Included in:
(In thousands)Beginning BalanceEarnings (Losses)Other Comprehensive Income (Losses)ImpairmentsPurchasesSalesPaydowns/MaturitiesTransfers In / OutEnding Balance
Year ended December 31, 2023        
Assets:
Fixed maturity securities available for sale:        
Corporate$— $— $— $— $— $— $— $— $— 
Total— — — — — — — — — 
Equity securities:
Common stocks2,599 (1,041)— — — — — — 1,558 
Preferred stocks11,299 (3)— (7,601)— — — — 3,695 
Total13,898 (1,044)— (7,601)— — — — 5,253 
Arbitrage trading account3,590 117 — — — — — 65 3,772 
Total$17,488 $(927)$— $(7,601)$— $— $— $65 $9,025 
Liabilities:
Trading account securities sold but not yet purchased$— $— $— $— $— $— $— $— $— 
Year ended December 31, 2022        
Assets:
Fixed maturity securities available for sale:        
Corporate$— $— $— $— $— $— $— $— $— 
Total— — — — — — — — — 
Equity securities:
Common stocks9,294 (6,695)— — — — — — 2,599 
Preferred stocks11,296 — — 925 (925)— — 11,299 
Total20,590 (6,692)— — 925 (925)— — 13,898 
Arbitrage trading account— (179)— — 4,686 (917)— — 3,590 
Total$20,590 $(6,871)$— $— $5,611 $(1,842)$— $— $17,488 
Liabilities:
Trading account securities sold but not yet purchased$— $— $— $— $— $— $— $— $— 
For the year ended December 31, 2023, an equity security, which no longer had a publicly traded price, was transferred into Level 3. For the year ended December 31, 2022, there were no securities transferred into or out of Level 3.Fair Value of Financial Instruments
The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments as of December 31, 2023 and 2022:
 20232022
(In thousands)Carrying ValueFair ValueCarrying ValueFair Value
Assets:    
Fixed maturity securities$20,178,308 $20,181,547 $17,587,349 $17,591,626 
Equity securities1,090,347 1,090,347 1,185,894 1,185,894 
Arbitrage trading account938,049 938,049 944,230 944,230 
Loans receivable201,271 198,244 193,002 187,981 
Cash and cash equivalents1,363,195 1,363,195 1,449,346 1,449,346 
Trading accounts receivable from brokers and clearing organizations303,614 303,614 233,863 233,863 
Due from broker36,747 36,747 3,609 3,609 
Liabilities:
Trading account securities sold but not yet purchased9,357 9,357 — — 
Senior notes and other debt1,827,951 1,480,076 1,828,823 1,439,188 
Subordinated debentures1,009,090 929,598 1,008,371 805,600 
The estimated fair values of the Company’s fixed maturity securities, equity securities available for sale and arbitrage trading account securities are based on various valuation techniques that rely on fair value measurements as described in Note 12 above. The fair value of loans receivable is estimated by using current institutional purchaser yield requirements for loans with similar credit characteristics, which is considered a Level 2 input. The fair value of the senior notes and other debt and the subordinated debentures is based on spreads for similar securities, which is considered a Level 2 input.