Goodwill and Intangible Assets (Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Historical Cost	$ 1,520,606	$ 1,420,232
Accumulated Amortization	1,120,044	1,094,826
Net	400,562	325,406
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Historical Cost	349,490	347,895
Accumulated Amortization	199,293	192,111
Net	150,197	155,784
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Historical Cost	774,154	692,634
Accumulated Amortization	569,148	555,384
Net	205,006	137,250
Other purchased intangibles
Finite-Lived Intangible Assets [Line Items]
Historical Cost	396,962	379,703
Accumulated Amortization	351,603	347,331
Net	$ 45,359	$ 32,372