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Goodwill and Other Intangible Assets (Schedule of Intangible Assets and Goodwill) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets [Line Items]      
Other intangible assets, net $ 50,996 $ 65,887  
Total goodwill and other intangible assets 249,641 262,226  
Goodwill And Other Intangible Assets      
Goodwill and Intangible Assets [Line Items]      
Goodwill, net 211,013 210,665 $ 197,590
Other intangible assets, net 38,628 51,561  
Total goodwill and other intangible assets 249,641 262,226  
Equity Method Investment, Nonconsolidated Investee or Group of Investees      
Goodwill and Intangible Assets [Line Items]      
Goodwill, net 10,598 10,598 $ 10,598
Other intangible assets, net 12,368 14,326  
Total goodwill and other intangible assets $ 22,966 $ 24,924