Goodwill and Intangible Assets (Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Historical Cost	$ 1,432,877	$ 1,431,385
Accumulated Amortization	1,064,934	968,570
Net	$ 367,943	$ 462,815
Trade names
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	10 years	10 years
Historical Cost	$ 265,406	$ 261,614
Accumulated Amortization	142,201	125,422
Net	$ 123,205	$ 136,192
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	8 years	8 years
Historical Cost	$ 690,942	$ 687,798
Accumulated Amortization	533,565	479,741
Net	$ 157,377	$ 208,057
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	4 years	4 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	5 years	5 years
Other purchased intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	9 years	8 years
Historical Cost	$ 476,529	$ 481,973
Accumulated Amortization	389,168	363,407
Net	$ 87,361	$ 118,566