v3.26.1
Debt
 6 Months Ended
Jun. 30, 2026
Debt Disclosure [Abstract]  
Debt DEBT
The principal amounts of our long-term debt consists of the following (in millions):
Maturity
Interest Rate
June 30, 2026December 31, 2025
20302.25%$402.5 $402.5 
20320%805.0 805.0 
 Total$1,207.5 $1,207.5 

A summary of interest expense and amortization of debt issuance costs is as follows (in millions):

Three Months Ended June 30,Six Months Ended June 30,
2026202520262025
Contractual interest expense
$2.2 $2.2 $4.5 $4.5 
Amortization of debt issuance costs and discount
1.4 0.6 2.7 1.1 
Total interest expense on debt
$3.6 $2.8 $7.2 $5.6 
Convertible Notes

In November 2024, the Company issued $402.5 million of 2.25% Convertible Notes due 2030 and in August 2025, the Company issued $805.0 million of 0% Convertible Notes due 2032. There are no required principal payments prior to the maturity of the 2.25% Convertible Notes or the 0% Convertible Notes. The 2.25% Convertible Notes bear interest at an annual rate of 2.25%, payable semi-annually in arrears on May 1 and November 1 of each year. The 0% Convertible Notes will not bear regular interest and the principal amount will not accrete.

For calendar quarters in which the Convertible Notes became convertible at the option of the holders, the Company provides notice to the holders of the Convertible Notes that the notes became convertible beginning on the first day of the respective subsequent quarter, and ending at the close of business on the last day of said quarter. As of July 31, 2026, one noteholder converted $2,000 worth of 2.25% Convertible Notes, which will settle in the third quarter of 2026. No other notes were converted during those periods. Additional terms and conditions of the 2.25% Convertible Notes and 0% Convertible Notes are described in Note 8, Debt, of the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.

8.25% Notes
Pursuant to a notice of redemption issued on February 24, 2025, on March 26, 2025, the Company redeemed all 8.25% Notes at a redemption price equal to 100% of the $74.3 million aggregate principal amount, together with any accrued and unpaid interest. The Company recorded a gain of $11.8 million related to the extinguishment of the long-term debt. As of both December 31, 2025 and June 30, 2026, none of the 8.25% Notes remained outstanding.