The following table summarizes the Company’s long-term debt:


	December 31,
	2023			2022
4.75% Convertible Senior Notes, due June 1, 2042	$	172,500		$	172,500
4.25% Convertible Senior Notes, due March 1, 2037		23,916			23,916
3.90% Promissory Note (a)		—			9,072
3.75% Callable Promissory Note (b)		—			6,871
4.55% Promissory Note, due through August 1, 2036		4,700			4,968
5.50% Promissory Note, due through July 1, 2033		11,906			—
Finance lease liabilities, due through October 15, 2024		2			13
Total principal amount		213,024			217,340
Less: unamortized issuance costs		(4,529	)		(5,653	)
Total long-term debt	$	208,495		$	211,687

(a)

Note assumed by 3rd party.

(b)

Note fully repaid.

The following table summarizes future maturities of long-term debt as of December 31, 2023, which takes into consideration the assumption that the 4.75% Convertible Senior Notes and 4.25% Convertible Senior Notes are repurchased at their respective next earliest call dates:


Due in 12 months following December 31,
2023	$	518
2024		543
2025		570
2026		197,015
2027		630
Thereafter		13,748
Total	$	213,024

Information with respect to interest expense related to long-term debt is as follows:


	Years Ended December 31,
	2023		2022		2021
Interest Expense:
Contractual interest	$	9,906	$	6,835	$	5,384
Non-cash expense (a)		1,129		706		827
Total	$	11,035	$	7,541	$	6,211

(a)

Represents amortization of debt issuance costs.

The Company’s Convertible Senior Notes consist of 4.25% Convertible Senior Notes that mature March 1, 2037 and 4.75% Convertible Senior Notes that mature June 1, 2042. The 4.25% Convertible Senior Notes were issued in March 2017 with cash interest payable semiannually in arrears on March 1 and September 1 of each year. In May 2022, the Company issued 4.75% Convertible Senior Notes in a private offering for an aggregate principal amount of $172,500. The net proceeds of the 4.75% Convertible Senior Notes were $166,486 after $6,014 in related issuance and transaction costs. The cash interest for the 4.75% Convertible Senior Notes is payable semiannually in arrears on June 1 and December 1 of each year, beginning on December 1, 2022. In conjunction with the issuance of the 4.75% Convertible Senior Notes, the Company entered into a share repurchase agreement providing for the repurchase of shares of the Company’s common stock. See Note 22 -- “Equity” under Share Repurchase Agreement for additional information.

The Convertible Senior Notes rank equally in right of payment to the Company’s existing and future unsecured and unsubordinated obligations. The Convertible Senior Notes do not contain any financial or operating covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by the Company or any of its subsidiaries. The Convertible Senior Notes provide no protection to the note holders in the event of a fundamental change or other corporate transaction involving the Company except those described in each respective indenture. The Convertible Senior Notes do not require a sinking fund to be established for the purpose of redemption.

The conversion feature of these Convertible Senior Notes is subject to conversion rate adjustments upon the occurrence of specified events (including payment of dividends above a specified amount) but will not be adjusted for any accrued and unpaid interest.

4.25% Convertible Senior Notes. When the Company’s cash dividends on common stock exceed $0.35 per share, it will result in adjustments to the conversion rate of the 4.25% Convertible Senior Notes. Accordingly, as of December 31, 2023, the conversion rate of the Company’s 4.25% Convertible Senior Notes was 16.5893 shares of common stock for each $1 in principal amount, which was the equivalent of approximately $60.28 per share. See Note 30 -- “Subsequent Events” for additional information.

4.75% Convertible Senior Notes. The conversion rate of the 4.75% Convertible Senior Notes is currently 12.4166 shares of common stock for each $1 in principal amount, which is the equivalent of approximately $80.54 per share.

The holders of the Convertible Senior Notes may convert all or a portion of their convertible senior notes during specified periods prior to each respective maturity date as follows: (1) during any calendar quarter commencing after the calendar quarter ending on the dates specified in each respective indenture, if the last reported sale price of the Company’s common stock for at least 20 trading days during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than 130% of the conversion price on each applicable trading day; (2) during the five business-day period after any ten consecutive trading-day period in which the trading price per $1 principal amount of the Convertible Senior Notes is less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; (3) if specified corporate events, including a change in control, occur; (4) if the respective Convertible Senior Notes are called for redemption, at any time prior to the dates specified in each respective indenture; or (5) at any time on the dates or during the periods specified in each respective indenture.

The note holders who elect to convert their Convertible Senior Notes in connection with a fundamental change as described in the indentures will be entitled to a “make-whole” adjustment in the form of an increase in the conversion rate. Upon conversion, the Company has options to satisfy its conversion obligation by paying or delivering cash, shares of its common stock or a combination of cash and shares of its common stock. As of December 31, 2023, none of the conditions allowing the holders of either class of Convertible Senior Notes to convert had been met.

The Company determined that the Convertible Senior Notes’ embedded conversion feature is not a derivative financial instrument and does not require bifurcation. At issuance of the 4.25% Convertible Senior Notes, which was prior to the adoption of ASU 2020-06 “Debt - Debt with Conversion and Other Options and Derivatives and Hedging - Contracts in Entity’s Own Equity,” the Company accounted for the equity component of the embedded conversion feature as a reduction in the carrying amount of the debt and an increase in additional paid-in capital.

The note holders have the right to require the Company to repurchase for cash all or any portion of the Convertible Senior Notes at par prior to the maturity date should any of the fundamental change events described in the indentures occur. The Company concluded that this embedded redemption feature is not a derivative financial instrument, does not require bifurcation, and that it is not probable at issuance that any of the specified fundamental change events will occur. Therefore, this embedded redemption feature is not substantive and will not affect the expected life of the liability.

4.25% Convertible Senior Notes. At the option of the holders of the 4.25% Convertible Senior Notes, the Company is required to repurchase for cash all or any portion of the 4.25% Convertible Senior Notes at par on March 1, 2022, March 1, 2027 or March 1, 2032. The Company amortized the issuance costs associated with the 4.25% Convertible Senior Notes over the period from March 3, 2017 to March 1, 2022. The debt issuance costs for the 4.25% Convertible Senior Notes had been fully amortized as of February 2022.

4.75% Convertible Senior Notes. At the option of the holders of the 4.75% Convertible Senior Notes, the Company is required to repurchase for cash all or any portion of the 4.75% Convertible Senior Notes at par on June 1, 2027, June 1, 2032 or June 1, 2037. The Company amortizes the issuance costs associated with the 4.75% Convertible Senior Notes over the period from May 23, 2022 to June 1, 2027. As of December 31, 2023, the remaining amortization period of the debt issuance costs was expected to be 3.4 years for the 4.75% Convertible Senior Notes.

The Company concluded that this embedded feature is not a derivative financial instrument and does not require bifurcation. Due to this provision, the Company determined that it is appropriate to amortize the debt issuance costs from the date each debt is issued to the earliest date at which the holders of the respective Convertible Senior Notes can demand payment.

The effective interest rate for the 4.75% Convertible Senior Notes, taking into account both cash and non-cash components, approximates 5.6%. Had a 20-year term been used for the amortization of the issuance costs of the 4.75% Convertible Senior Notes, the annual effective interest rate charged to earnings would have decreased to approximately 5.0%.

On March 31, 2023, in conjunction with the sale of the retail shopping center investment property in Melbourne, Florida for a price of $18,500, the buyer assumed the 3.90% Promissory Note from the Company which consisted of the $8,979 principal balance plus $16 of accrued interest at March 31, 2023.

On March 31, 2023, the Company made an early repayment of the entirety of its 3.75% Callable Promissory Note which included $6,775 of principal balance plus $22 of accrued interest. As a result, the Company incurred a $177 loss on extinguishment of debt. The note was collateralized by the retail shopping center investment property in Sorrento, Florida which was sold as described in e) Real Estate Investments under Note 5 -- “Investments.”

The loan agreement is secured by commercial real estate in Tampa, Florida and an associated lease agreement. The loan bears interest at a fixed annual rate of 4.55%. Approximately $41 of principal and interest is payable in 216 monthly installments. The promissory note may be repaid in full or in part after September 1, 2020 as long as the Company provides at least 30 days’ written notice and pays a prepayment consideration as specified in the loan agreement.

On June 26, 2023, Gulf to Bay LM, LLC, a subsidiary of the Company, entered into a ten-year secured loan agreement for proceeds of $12,000. The loan is collateralized by the Company’s Clearwater, Florida real estate, which is owned by Gulf to Bay LM, LLC, and the lease agreements associated with this property. The loan bears a fixed annual interest rate of 5.50%. Approximately $74 of principal and interest is payable in 120 monthly installments. The promissory note may be repaid in full or in part after August 1, 2025 as long as the Company provides at least 30 days’ written notice and pays a prepayment consideration as specified in the loan agreement. The proceeds are used for real estate development projects or other general business purposes.