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Goodwill and Other Intangible Assets (Goodwill) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Goodwill | $ 465,697,000 | $ 465,547,000 | $ 469,433,000
Number of reportable segments | segment | 3 |  |
Goodwill, impairment loss | $ 0 |  |

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