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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2022
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] |
Fair Value Measurements | Fair Value Measurements The Company employs a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The fair value of a financial instrument is the amount 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 using the exit price. Accordingly, when market observable data are not readily available, the Company’s own assumptions are set to reflect those that market participants would be presumed to use in pricing the asset or liability at the measurement date. Assets and liabilities recorded at fair value on the consolidated balance sheets are categorized based on the level of judgment associated with inputs used to measure their fair value and the level of market price observability, as follows:
Level 1 | Unadjusted quoted prices are available in active markets for identical assets or liabilities as of the reporting date.
Level 2 | Pricing inputs are other than quoted prices in active markets, which are based on the following:
| a. Quoted prices for similar assets or liabilities in active markets;
| b. Quoted prices for identical or similar assets or liabilities in non-active markets; or
| c. Either directly or indirectly observable inputs as of the reporting date.
Level 3 | Pricing inputs are unobservable and significant to the overall fair value measurement, and the determination of fair value requires significant management judgment or estimation.
In certain cases, inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. Thus, a Level 3 fair value measurement may include inputs that are observable (Level 1 or Level 2) and unobservable (Level 3). The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and consideration of factors specific to the asset or liability. The Company uses prices and inputs that are current as of the measurement date, including during periods of market disruption. In periods of market disruption, the ability to observe prices and inputs may be reduced for many instruments. This condition could cause an instrument to be reclassified from Level 1 to Level 2, or from Level 2 to Level 3. The Company recognizes transfers between levels at either the actual date of the event or a change in circumstances that caused the transfer. Summary of Significant Valuation Techniques for Financial Assets and Financial Liabilities The Company’s fair value measurements are based on the market approach, which utilizes market transaction data for the same or similar instruments. The Company obtained unadjusted fair values on 98.2% of its investment portfolio from an independent pricing service at December 31, 2022. Level 1 measurements—Fair values of financial assets and financial liabilities are obtained from an independent pricing service, and are based on unadjusted quoted prices for identical assets or liabilities in active markets. Additional pricing services and closing exchange values are used as a comparison to ensure that reasonable fair values are used in pricing the investment portfolio. U.S. government bonds/Short-term bonds: Valued using unadjusted quoted market prices for identical assets in active markets. Common stock: Comprised of actively traded, exchange listed U.S. and international equity securities and valued based on unadjusted quoted prices for identical assets in active markets. Money market instruments: Valued based on unadjusted quoted prices for identical assets in active markets. Options sold: Comprised of free-standing exchange listed derivatives that are actively traded and valued based on quoted prices for identical instruments in active markets. Level 2 measurements—Fair values of financial assets and financial liabilities are obtained from an independent pricing service or outside brokers, and are based on prices for similar assets or liabilities in active markets or valuation models whose inputs are observable, directly or indirectly, for substantially the full term of the asset or liability. Additional pricing services are used as a comparison to ensure reliable fair values are used in pricing the investment portfolio. Municipal securities: Valued based on models or matrices using inputs such as quoted prices for identical or similar assets in active markets. Mortgage-backed securities: Comprised of securities that are collateralized by residential and commercial mortgage loans and valued based on models or matrices using multiple observable inputs, such as benchmark yields, reported trades and broker/dealer quotes, for identical or similar assets in active markets. The Company had holdings of $27.3 million and $25.2 million in commercial mortgage-backed securities at December 31, 2022 and 2021, respectively. Corporate securities/Short-term bonds: Valued based on a multi-dimensional model using multiple observable inputs, such as benchmark yields, reported trades, broker/dealer quotes and issue spreads, for identical or similar assets in active markets. Preferred stock: Valued based on observable inputs, such as underlying and common stock of same issuer and appropriate spread over a comparable U.S. Treasury security, for identical or similar assets in active markets. Collateralized loan obligations ("CLOs"): Valued based on underlying debt instruments and the appropriate benchmark spread for similar assets in active markets. Other asset-backed securities: Comprised of securities that are collateralized by non-mortgage assets, such as automobile loans, valued based on models or matrices using multiple observable inputs, such as benchmark yields, reported trades and broker/dealer quotes, for identical or similar assets in active markets. Level 3 measurements—Fair values of financial assets are based on inputs that are both unobservable and significant to the overall fair value measurement, including any items in which the evaluated prices obtained elsewhere were deemed to be of a distressed trading level. At December 31, 2022 and 2021, the Company did not have any financial assets or financial liabilities based on Level 3 measurements. Fair value measurement using NAV practical expedient - The fair values of the Company's investment in private equity funds measured at net asset value are determined using net asset value ("NAV") as advised by the external fund managers and the third party administrators. The NAV of the Company's limited partnership or limited liability company interest in such a fund is based on the manager's and the administrator's valuation of the underlying holdings in accordance with the fund's governing documents and GAAP. In accordance with applicable accounting guidance, private equity funds measured at fair value using the NAV practical expedient are not classified in the fair value hierarchy. At December 31, 2022, the Company had capital invested in five such funds: the strategy of three such funds with a combined fair value of approximately $89.4 million at December 31, 2022 is to provide current income to investors by investing mainly in secured loans, CLOs or CLO issuers, and equity interests in vehicles established to purchase and warehouse loans; the strategy of another such fund with a fair value of approximately $2,000 at December 31, 2022 is to achieve favorable long-term financial returns and measurable positive social and environmental returns by investing in privately held technology, healthcare, specialty consumer goods and service companies; and the strategy of the other such fund with a fair value of approximately $0.8 million at December 31, 2022 is to achieve long-term capital appreciation through privately-negotiated venture capital investments in seed- and early-stage portfolio companies with technology-enabled business models. The Company had approximately $9 million in unfunded commitments at December 31, 2022 with respect to the private equity funds measured at NAV. The underlying assets of the funds are expected to be liquidated over the period of approximately one year to ten years from December 31, 2022. In addition, the Company does not have the ability to redeem or withdraw from the funds, or to sell, assign, pledge or transfer its investment, without the consent from the General Partner or Managers of each fund, but will receive distributions based on the liquidation of the underlying assets and the interest proceeds from the underlying assets. The Company’s financial instruments at fair value are reflected in the consolidated balance sheets on a trade-date basis. Related unrealized gains or losses are recognized in net realized investment gains or losses in the consolidated statements of operations. Fair value measurements are not adjusted for transaction costs. The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis, and indicate the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair values:
| December 31, 2022
| Level 1 |  | Level 2 |  | Level 3 |  | Total
| (Amounts in thousands)
Assets |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
U.S. government bonds | $ | 103,519 |  |  | $ | 55,088 |  |  | $ | — |  |  | $ | 158,607 |
Municipal securities | — |  |  | 2,737,183 |  |  | — |  |  | 2,737,183 |
Mortgage-backed securities | — |  |  | 166,260 |  |  | — |  |  | 166,260 |
Corporate securities | — |  |  | 569,553 |  |  | — |  |  | 569,553 |
Collateralized loan obligations | — |  |  | 320,252 |  |  | — |  |  | 320,252 |
Other asset-backed securities | — |  |  | 136,456 |  |  | — |  |  | 136,456 |
Total fixed maturity securities | 103,519 |  |  | 3,984,792 |  |  | — |  |  | 4,088,311 |
Equity securities: |  |  |  |  |  |  |
Common stock | 558,169 |  |  | — |  |  | — |  |  | 558,169 |
Preferred stock | — |  |  | 51,236 |  |  | — |  |  | 51,236 |
Private equity funds measured at net asset value (1) |  |  |  |  |  |  | 90,147 |
Total equity securities | 558,169 |  |  | 51,236 |  |  | — |  |  | 699,552 |
Short-term investments: |  |  |  |  |  |  |
Short-term bonds | 51,638 |  |  | 8,238 |  |  | — |  |  | 59,876 |
Money market instruments | 63,021 |  |  | — |  |  | — |  |  | 63,021 |
Other | 40 |  |  | — |  |  | — |  |  | 40 |
Total short-term investments | 114,699 |  |  | 8,238 |  |  | — |  |  | 122,937 |
Total assets at fair value | $ | 776,387 |  |  | $ | 4,044,266 |  |  | $ | — |  |  | $ | 4,910,800 |
Liabilities |  |  |  |  |  |  |
Other liabilities: |  |  |  |  |  |  |
Options sold | 162 |  |  | — |  |  | — |  |  | 162 |
Total liabilities at fair value | $ | 162 |  |  | $ | — |  |  | $ | — |  |  | $ | 162 |
| December 31, 2021
| Level 1 |  | Level 2 |  | Level 3 |  | Total
| (Amounts in thousands)
Assets |  |  |  |  |  |  |
Fixed maturity securities: |  |  |  |  |  |  |
U.S. government bonds | $ | 13,085 |  |  | $ | — |  |  | $ | — |  |  | $ | 13,085 |
Municipal securities | — |  |  | 2,843,221 |  |  | — |  |  | 2,843,221 |
Mortgage-backed securities | — |  |  | 137,002 |  |  | — |  |  | 137,002 |
Corporate securities | — |  |  | 523,853 |  |  | — |  |  | 523,853 |
Collateralized debt obligations | — |  |  | 314,153 |  |  | — |  |  | 314,153 |
Other asset-backed securities | — |  |  | 200,209 |  |  | — |  |  | 200,209 |
Total fixed maturity securities | 13,085 |  |  | 4,018,438 |  |  | — |  |  | 4,031,523 |
Equity securities: |  |  |  |  |  |  |
Common stock | 797,024 |  |  | — |  |  | — |  |  | 797,024 |
Preferred stock | — |  |  | 65,501 |  |  | — |  |  | 65,501 |
Private equity funds measured at net asset value (1) |  |  |  |  |  |  | 108,414 |
Total equity securities | 797,024 |  |  | 65,501 |  |  | — |  |  | 970,939 |
Short-term investments: |  |  |  |  |  |  |
Short-term bonds | 1,453 |  |  | 15,748 |  |  | — |  |  | 17,201 |
Money market instruments | 122,917 |  |  | — |  |  | — |  |  | 122,917 |
Other | 9 |  |  | — |  |  | — |  |  | 9 |
Total short-term investments | 124,379 |  |  | 15,748 |  |  | — |  |  | 140,127 |
Total assets at fair value | $ | 934,488 |  |  | $ | 4,099,687 |  |  | $ | — |  |  | $ | 5,142,589 |
Liabilities |  |  |  |  |  |  |
Other liabilities: |  |  |  |  |  |  |
Options sold | 301 |  |  | — |  |  | — |  |  | 301 |
Total liabilities at fair value | $ | 301 |  |  | $ | — |  |  | $ | — |  |  | $ | 301 |
__________ (1) The fair value is measured using the NAV practical expedient; therefore, it is not categorized within the fair value hierarchy. The fair value amount is presented in this table to permit reconciliation of the fair value hierarchy to the amounts presented in the Company's consolidated balance sheets. There were no transfers between Levels 1, 2, and 3 of the fair value hierarchy in 2022 and 2021. At December 31, 2022 and 2021, there were no material assets or liabilities measured at fair value on a nonrecurring basis. Financial Instruments Disclosed, But Not Carried, at Fair Value The following tables present the carrying value and fair value of the Company’s financial instruments disclosed, but not carried, at fair value, and the level within the fair value hierarchy at which such instruments are categorized:
| December 31, 2022
| Carrying Value |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
| (Amounts in thousands)
Liabilities |  |  |  |  |  |  |  |  |
Notes payable: |  |  |  |  |  |  |  |  |
Unsecured notes | $ | 373,330 |  |  | $ | 350,644 |  |  | $ | — |  |  | $ | 350,644 |  |  | $ | — |
Unsecured credit facility | 25,000 |  |  | 24,987 |  |  | — |  |  | 24,987 |  |  | — |
Total | $ | 398,330 |  |  | $ | 375,631 |  |  | $ | — |  |  | $ | 375,631 |  |  | $ | — |
| December 31, 2021
| Carrying Value |  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
| (Amounts in thousands)
Liabilities |  |  |  |  |  |  |  |  |
Notes payable: |  |  |  |  |  |  |  |  |
Unsecured notes | $ | 372,931 |  |  | $ | 413,378 |  |  | $ | — |  |  | $ | 413,378 |  |  | $ | — |
Total | $ | 372,931 |  |  | $ | 413,378 |  |  | $ | — |  |  | $ | 413,378 |  |  | $ | — |
Unsecured Notes The fair value of the Company’s publicly traded $375 million unsecured notes at December 31, 2022 and 2021 was based on the spreads above the risk-free yield curve. These spreads are generally obtained from the new issue market, secondary trading and broker-dealer quotes. See Note 8. Notes Payable for additional information on unsecured notes. Unsecured Credit Facility The fair value of the Company's $25 million drawdown under the unsecured credit facility at December 31, 2022 is based on the unadjusted quoted price for similar notes in active markets. See Note 8. Notes Payable for additional information on unsecured credit facility.

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI https://asc.fasb.org/topic&trid=2155941 + Details
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