Other Assets - Notes Receivable Due From Equity Instruments (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Other Assets [Abstract]
Total notes receivable due from equity investments		$ 193,334	$ 201,979
Less-current portion	[1]	23,651	19,075
Long-term portion	[2]	$ 169,683	$ 182,904

[1] Included within Trade and other receivables, net in our consolidated balance sheets.

[2] Included within Other assets in our consolidated balance sheets.