Segment Information - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Segment Information [Line Items]
Equity method investments	$ 79,000		$ 75,308
Equity in Gains (Losses) Earnings of 50% or Less Owned Companies	$ 4,100	$ 100
Maximum
Segment Information [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%
Minimum
Segment Information [Line Items]
Equity method investment, ownership percentage	20.00%
Other Offshore Marine Services Joint Ventures
Segment Information [Line Items]
Equity method investments	$ 3,702	$ 121,500	$ 3,850
Other Offshore Marine Services Joint Ventures | Maximum
Segment Information [Line Items]
Equity method investment, ownership percentage	50.00%	50.00%
Other Offshore Marine Services Joint Ventures | Minimum
Segment Information [Line Items]
Equity method investment, ownership percentage	20.00%