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Equity method and other investments Equity Method and Other Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Schedule of Equity Method Investments [Line Items] |  |
Equity method and other investments | $ 255,489 | $ 241,983
Adjusted cost method investments |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method and other investments | 18,105 | 10,448
Other equity method partnerships |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method and other investments | 115,247 | 114,611
APAC JV - Unrelated Noncontrolling Investor |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity method and other investments | $ 122,137 | $ 116,924

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