Reportable Segments - Narratives (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 segment	Dec. 31, 2020	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of operating segments		3	3
Reportable segments		3	3
Equity in net income from affiliated companies	$ 21,237			$ 46,022	$ 37,569