Restricted Available-for-Sale Investments

3 Months Ended

Mar. 31, 2025

Investments, Debt and Equity Securities [Abstract]

Restricted Available-for-Sale Investments

Note 4. Restricted Available-for-Sale Investments

The following tables reconcile the amortized cost, gross unrealized gains and losses included in accumulated other comprehensive income or loss, and estimated fair value of the Company’s restricted AFS investments as of the periods indicated:


	March 31, 2025
Dollars in thousands	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Restricted investments	$	21,904	$	—	$	(217	)	$	21,687


	December 31, 2024
Dollars in thousands	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Restricted investments	$	21,633	$	92	$	(13	)	$	21,712

The following tables include the gross unrealized losses and estimated fair values of restricted AFS investments that were in a continuous unrealized loss position, for which no allowance for credit loss has been recorded, as of the periods indicated:


	March 31, 2025
	Less than 12 Months					12 Months or Longer				Total
Dollars in thousands	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
Restricted investments	$	21,687	$	(217	)	$	—	$	—	$	21,687	$	(217	)


	December 31, 2024
	Less than 12 Months					12 Months or Longer				Total
Dollars in thousands	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
Restricted investments	$	2,205	$	(13	)	$	—	$	—	$	2,205	$	(13	)

The restricted AFS investments consist of U.S. Treasuries which are measured at fair value and include accrued interest receivables of $0.3 million and $13 thousand as of March 31, 2025 and December 31, 2024, respectively. The investments consist of highly rated securities backed by the U.S. federal government. As a result, the Company has not recorded an allowance for credit losses related to the restricted AFS investments.

The following table includes the amortized cost and estimated fair values of restricted AFS investments by contractual maturity as of the period indicated:


	March 31, 2025
Dollars in thousands	Amortized Cost		Estimated Fair Value
Due in one year	$	19,663	$	19,473
Due within one year to five years		2,241		2,214
Due within five years to ten years		—		—
Due after ten years		—		—
Total	$	21,904	$	21,687

The Company had no gross realized gains or losses during the three months ended March 31, 2025 and 2024, respectively. For additional information on the Company's restricted AFS investments, see Note 8, "Disclosure About Fair Value of Financial Instruments."