Goodwill and Other Intangible Assets (Narrative) (Details)	3 Months Ended	6 Months Ended	9 Months Ended
Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2020	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Number of Reporting Units	3		2
Goodwill, Impairment Loss				$ 0
Amortization of Intangible Assets	$ 8,200,000	$ 6,100,000		21,200,000	$ 18,000,000.0
Capitalized software
Impairment of Intangible Assets, Finite-lived	$ 1,400,000			$ 1,400,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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