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Leases (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Lease, Cost [Table Text Block]
The components of lease expense are as follows (dollars in thousands):
Year ended December 31,
202220212020
Operating lease cost$10,560 8,510 7,870 
Short-term, variable and other lease costs3,350 2,460 1,540 
Total lease cost$13,910 $10,970 $9,410 
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Maturities of lease liabilities are as follows (dollars in thousands):
Year ended December 31,
Operating Leases(a)
2023$9,970 
20249,130 
20257,830 
20267,730 
20276,650 
Thereafter14,220 
Total lease payments55,530 
Less: Imputed interest(6,240)
Present value of lease liabilities$49,290 
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(a)     The maturity table excludes cash flows associated with exited lease facilities. Liabilities for exited lease facilities are included in accrued liabilities and other long-term liabilities in the accompanying consolidated balance sheet.