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FAIR VALUE MEASUREMENTS (Tables)
3 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Assets Measured for at Fair Value on Recurring Basis
The following tables set forth by level within the fair value hierarchy the Company’s assets measured at fair value on a recurring basis as of the dates presented (in thousands):
Fair Value Measurements
As of March 31, 2025
 Level 1Level 2Level 3Total
Available-For-Sale Debt Securities:   
  U.S. government obligations and agencies$— $21,491 $— $21,491 
  Corporate bonds— 901,783 — 901,783 
  Mortgage-backed and asset-backed securities— 377,522 — 377,522 
  Municipal bonds— 14,578 — 14,578 
  Redeemable preferred stock— 8,964 — 8,964 
Equity Securities:
  Common stock17,170 — — 17,170 
  Mutual funds62,813 — — 62,813 
Investment in Private Equity Limited Partnership— — 11,750 11,750 
Total assets accounted for at fair value$79,983 $1,324,338 $11,750 $1,416,071 
Assets carried at NAV, which approximates fair value and which are not categorized within the fair value hierarchy, reported as of:
Investment in Private Equity Limited Partnerships$3,932 
Total assets at fair value$1,420,003 
Fair Value Measurements
As of December 31, 2024
Level 1Level 2Level 3Total
Available-For-Sale Debt Securities:
  U.S. government obligations and agencies$— $19,747 $— $19,747 
  Corporate bonds— 868,948 — 868,948 
  Mortgage-backed and asset-backed securities— 357,030 — 357,030 
  Municipal bonds— 14,354 — 14,354 
  Redeemable preferred stock— 9,000 — 9,000 
Equity Securities:
  Common stock14,409 — — 14,409 
  Mutual funds63,343 — — 63,343 
Investment in Private Equity Limited Partnership— — 12,202 12,202 
Total assets accounted for at fair value$77,752 $1,269,079 $12,202 $1,359,033 
Assets carried at NAV, which approximates fair value and which are not categorized within the fair value hierarchy, reported as of:
Investment in Private Equity Limited Partnerships$3,921 
Total assets at fair value$1,362,954 
Schedule of Fair Value Measurement Inputs and Valuation Techniques
The following table summarizes quantitative information related to the significant unobservable inputs for Level 3 investments, which were carried at fair value as of the dates presented (in thousands):
As of March 31, 2025
Range
Fair Value
Valuation
 Methodology
Unobservable Input
Weighted Average Mean
Minimum
Maximum
Assets:
Investment in Private Equity Limited Partnership
$11,750 
Market
 Approach
Trailing Twelve Month EBITDA Multiple
6.6x5.3x7.0x
As of December 31, 2024
Range
Fair Value
Valuation
 Methodology
Unobservable Input
Weighted Average Mean
Minimum
Maximum
Assets:
Investment in Private Equity Limited Partnership
$12,202 
Market
 Approach
Trailing Twelve Month EBITDA Multiple
5.8x5.3x7.0x
Schedule of Carrying Value and Estimated Fair Values of Financial Instruments not Carried at Fair Value
The following table summarizes the carrying value and estimated fair values of the Company’s financial instruments not carried at fair value as of the dates presented (in thousands):
As of March 31, 2025As of December 31, 2024
Carrying ValueEstimated Fair ValueCarrying ValueEstimated Fair Value
Liabilities (debt):
Surplus note (1)$2,206 $2,122 $2,573 $2,481 
5.625% Senior unsecured notes (2)
100,000 99,792 100,000 99,086 
Total debt$102,206 $101,914 $102,573 $101,567 
(1) The fair value of the surplus note was determined by management from the expected cash flows discounted using the interest rate quoted by the holder. The SBA is the holder of the surplus note and the quoted interest rate is below prevailing rates quoted by private lending institutions. However, as the Company’s use of funds from the surplus note is limited by the terms of the agreement, the Company has determined the interest rate quoted by the SBA to be appropriate for the purpose of establishing the fair value of the note (Level 2).
(2) The fair value of the senior unsecured notes was determined based on pricing from quoted prices for similar assets in active markets and was included as Level 2.