Other Noncurrent Assets - Schedule of Other Noncurrent Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Identifiable intangible assets (net of accumulated amortization of $258.0 million, $218.3 million, and $248.0 million, respectively)	$ 534,044	$ 553,114	$ 580,497
Deferred income taxes	62,674	67,900	50,510
Other	199,627	212,198	217,846
Total other noncurrent assets	796,345	833,212	848,853
Identifiable intangible assets, net of accumulated amortization	$ 258,000	$ 248,000	$ 218,300