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Borrowings (Tables)
 6 Months Ended
Jun. 30, 2021
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments Borrowings (net of debt issuance costs, debt discount, and amortization) consist of the following:
(in millions)June 30, 2021December 31, 2020
3.25% convertible senior notes$169.5 $165.1 
Revolving credit facility— — 
Total169.5 165.1 
Less current maturities169.5 165.1 
Total long-term debt$— $— 
Contractual Obligation, Fiscal Year Maturity Schedule Total debt principal payments over the next five years are as follows:
(in millions)Q3-Q4 20212022202320242025
Debt principal payments$172.5 $— $— $— $— 
Schedule of Convertible Debt
The Notes consist of the following:
(in millions)June 30, 2021December 31, 2020
Liability component:
Principal$172.5 $172.5 
Less debt issuance costs and debt discount, net of amortization(3.0)(7.4)
Total169.5 165.1 
Less current maturities (1)
169.5 165.1 
Long-term portion$— $— 
Equity component (2)
$29.9 $29.9 
(1) There are no required principal payments due until maturity in November 2021.
(2) Recorded in the Consolidated Balance Sheets within additional paid-in capital, inclusive of the $1.3 million of issuance costs in equity.
Schedule of Convertible Debt Interest Expense The following table sets forth total interest expense recognized related to the Notes:
Three Months Ended June 30, Six Months Ended June 30,
(in millions)2021202020212020
3.25% coupon$1.4 $1.4 $2.8 $2.8 
Amortization of debt issuance costs0.2 0.3 0.5 0.5 
Amortization of debt discount2.0 1.8 3.9 3.6 
Total$3.6 $3.5 $7.2 $6.9