Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments - Additional Information (Details)

v3.19.1
Equity Method Investments - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Equity [Abstract]    
Income (loss) from equity method investments $ 4,506 $ (2,285)