Equity method and other investments Equity Method and Other Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	$ 254,499	$ 241,983
Adjusted cost method investments
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	16,448	10,448
Other equity method partnerships
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	114,355	114,611
APAC JV - Deconsolidated Noncontrolling Entity
Schedule of Equity Method Investments [Line Items]
Equity method and other investments	$ 123,696	$ 116,924