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Leases (Summary of Supplemental Cash Flow Information Related to Leases) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities      
Operating cash flows from operating leases $ 9.6 $ 8.0 $ 6.8
Operating cash flows from finance leases 1.3 0.8 0.6
Financing cash flows from finance leases 3.3 2.7 2.2
ROU assets obtained in exchange for lease liabilities      
Operating leases [1] 19.0 15.8 3.9
Finance leases [2] $ 13.6 $ 12.3 $ 0.0
[1] During 2024, increases in ROU assets included $13.0 million from the acquisitions of 3form and Zahner and a $4.7 million increase from modifications that did not involve obtaining a new ROU asset. During 2023, increases in ROU assets included a decrease of $1.0 million due to a change in lease classification upon modification and an increase of $0.6 million resulting from modifications that did not involve obtaining a new ROU asset. During 2022, increases in ROU assets included $1.0 million resulting from modifications that did not involve obtaining a new ROU asset. Modifications for all years presented resulted primarily from changes in the terms of existing leases.
[2] During 2024, increases in ROU assets included $8.9 million from the acquisition of Zahner and a $1.1 million decrease from modifications that did not involve obtaining a new ROU asset. During 2023, increases in ROU assets included $8.6 million due to a change in lease classification upon modification for an existing manufacturing facility within our Architectural Specialties segment that had a modified expected lease term of 13 years, in addition to an increase of $3.7 million for a lease modification that did not involve obtaining a new ROU asset.