Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Reduction in carrying amount of goodwill	$ 336
Aggregate amortization expense for amortizable intangible assets	9,500	$ 12,100
International & Other
Finite-Lived Intangible Assets [Line Items]
Accumulated impairment charges	123,100		$ 123,100
Reduction in carrying amount of goodwill	0
Domestic Operations
Finite-Lived Intangible Assets [Line Items]
Reduction in carrying amount of goodwill	$ 336