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Acquisitions (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Feb. 28, 2026 | Dec. 31, 2025 | Sep. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Payments to acquire business, net |  |  |  |  |  | $ 64.8 | $ (0.8)
Operating ROU Assets |  | $ 46.4 |  | $ 49.0 |  | 49.0 |
Goodwill |  | 217.8 |  | 259.2 |  | 259.2 |
Net sales |  |  |  | 472.0 | $ 424.6 | 881.9 | 807.3
Operating income, losses |  |  |  | 133.8 | $ 123.2 | 228.0 | $ 221.7
Geometrik [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Payments to acquire business |  |  | $ 7.7 |  |  |  |
Acquisition-related contingent consideration |  |  | 0.3 |  |  |  |
Business acquisition, total fair value of liabilities assumed, less tangible assets acquired |  |  | 1.4 |  |  |  |
Business acquisition, accounts receivable |  |  | 0.5 |  |  |  |
Business acquisition, inventory |  |  | 0.5 |  |  |  |
Business acquisition, property, plant and equipment |  |  | 1.6 |  |  |  |
Operating ROU Assets |  |  | 3.8 |  |  |  |
Operating lease liability |  |  | 3.8 |  |  |  |
Business acquisition, accounts payable and accrued liabilities |  |  | 1.3 |  |  |  |
Fair value of identifiable intangible assets acquired |  |  | 1.4 |  |  |  |
Goodwill |  |  | 5.2 |  |  |  |
Geometrik [Member] | Trade Names [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired |  |  | $ 0.9 |  |  |  |
Estimated Useful Life |  |  | 15 years |  |  |  |
Geometrik [Member] | Backlog [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired |  |  | $ 0.3 |  |  |  |
Estimated Useful Life |  |  | 1 year |  |  |  |
Geometrik [Member] | Maximum [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Acquisition-related contingent consideration |  |  | $ 1.5 |  |  |  |
Eventscape [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Acquisition-related contingent consideration | $ 0.4 |  |  |  |  |  |
Business acquisition, cash acquired | 1.3 |  |  |  |  |  |
Payments to acquire business, net | 64.6 |  |  |  |  |  |
Business acquisition, total fair value of liabilities assumed, less tangible assets acquired | 3.2 |  |  |  |  |  |
Business acquisition, accounts receivable | 12.5 |  |  |  |  |  |
Operating ROU Assets | 5.5 |  |  |  |  |  |
Operating lease liability | 5.5 |  |  |  |  |  |
Business acquisition, accounts payable and accrued liabilities | 11.1 |  |  |  |  |  |
Fair value of identifiable intangible assets acquired | 16.5 |  |  |  |  |  |
Goodwill | 45.3 |  |  |  |  |  |
Eventscape [Member] | Trade Names [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired | $ 10.4 |  |  |  |  |  |
Estimated Useful Life | 15 years |  |  |  |  |  |
Eventscape [Member] | Customer Relationships [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired | $ 5.6 |  |  |  |  |  |
Estimated Useful Life | 6 years |  |  |  |  |  |
Eventscape [Member] | Maximum [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Acquisition-related contingent consideration | $ 7.5 |  |  |  |  |  |
Parallel [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Business acquisition, cash acquired |  | 0.6 |  |  |  |  |
Payments to acquire business, net |  | 7.2 |  |  |  |  |
Business acquisition, total fair value of liabilities assumed, less tangible assets acquired |  | 2.6 |  |  |  |  |
Business acquisition, inventory |  | 1.3 |  |  |  |  |
Business acquisition, property, plant and equipment |  | 1.8 |  |  |  |  |
Operating ROU Assets |  | 1.1 |  |  |  |  |
Operating lease liability |  | 1.1 |  |  |  |  |
Fair value of identifiable intangible assets acquired |  | 2.1 |  |  |  |  |
Goodwill |  | 2.5 |  |  |  |  |
Parallel [Member] | Trade Names [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired |  | $ 0.9 |  |  |  |  |
Estimated Useful Life |  | 15 years |  |  |  |  |
Parallel [Member] | Customer Relationships [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Fair value of identifiable intangible assets acquired |  | $ 0.8 |  |  |  |  |
Estimated Useful Life |  | 6 years |  |  |  |  |
Eventscape Parallel and Geometrik [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Net sales |  |  |  | 11.5 |  | 16.9 |
Operating income, losses |  |  |  | (0.1) |  | (2.6) |
Depreciation and amortization |  |  |  | $ 0.7 |  | $ 1.0 |

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