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Equity Investees (Consolidated Financial Statements Related to Equity Investees) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Equity Method Investments and Joint Ventures [Abstract] |  |
Genesis’ share of operating earnings | $ 16,870 | $ 14,514
Amortization of excess purchase price | (3,873) | (3,942)
Net equity in earnings | 12,997 | 10,572
Distributions received | $ 17,825 | $ 19,629

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