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Right of Use Assets and Liabilities (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Components of lease expense
The components of lease expense were as follows:
Year Ended December 31,
(dollars in millions)202220212020
Operating lease cost$2.1 $1.4 $1.0 
Schedule of supplemental cash flow information related to leases
Supplemental cash flow information related to leases was as follows:
December 31,
(dollars in millions)202220212020
Cash paid for amounts included in the measurement of lease liabilities:
  
Operating cash flows from operating leases$1.9 $1.2 $0.9 
Supplemental non-cash information:
Right-of-use assets obtained in exchange for new lease obligations
$2.4 $3.2 $0.6 
Schedule of maturities of operating lease liabilities
Maturities of operating lease liabilities as of December 31, 2022 were as follows:
(dollars in millions)
2023$2.0 
20242.2 
20250.5 
2026— 
Total lease payments4.7 
Less: imputed interest(0.2)
Total$4.5