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Borrowings (Tables)
 9 Months Ended
Sep. 30, 2020
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)September 30, 2020December 31, 2019
3.25% convertible senior notes$163.0 $156.8 
Revolving credit facility50.0 — 
Total213.0 156.8 
Less current maturities— — 
Total long-term debt$213.0 $156.8 
Contractual Obligation, Fiscal Year Maturity Schedule
Total debt principal payments over the next five years are as follows:
(in millions)Q4 20202021202220232024
Debt principal payments$— $172.5 $— $— $50.0 
Schedule of Convertible Debt
The Notes consist of the following:
(in millions)September 30, 2020December 31, 2019
Liability component:
Principal$172.5 $172.5 
Less debt issuance costs and debt discount, net of amortization(9.5)(15.7)
Total163.0 156.8 
Less current maturities (1)
— — 
Long-term portion$163.0 $156.8 
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 September 30, Nine Months Ended September 30,
(in millions)2020201920202019
3.25% coupon$1.4 $1.4 $4.2 $4.2 
Amortization of debt issuance costs0.2 0.2 0.7 0.6 
Amortization of debt discount1.9 1.7 5.5 5.1 
Total$3.5 $3.3 $10.4 $9.9 
Schedule of Revolving Credit Facilities
Revolving credit facility borrowings consist of the following:
(in millions)September 30, 2020December 31, 2019
$400.0 million revolving credit facility $50.0 $— 
Less current maturities — — 
Long-term portion$50.0 $—