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Other Investments - Summarized Investee Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Investments, All Other Investments [Abstract] |  |
Revenues | $ 40,165 | $ 21,820
Expenses | 23,587 | 10,683
Net Income Attributable to Parent | $ 17,347 | $ 6,619

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