Cash Flows (Summary of Non-Cash Activities and Other Supplemental Data) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Non-Cash Investing and Financing Activities:
Operating lease additions	$ 3,171	$ 7,527
Capital expenditures incurred but not yet paid	2,243	5,481
Contingent consideration for purchase of noncontrolling interests	0	2,806
Supplemental Data:
Cash interest paid	123,715	105,827
Income taxes paid, net	$ 28,829	$ 39,322