Property And Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Summary of gross components of property and equipment

The following is a summary of the gross components of property and equipment (dollars in thousands):

		December 31,
	Estimated Useful Life	2021		2020
Vessels	15 to 30 years	$	2,343,162	$	2,349,752
ROVs and trenchers	10 years		257,274		263,968
Machinery, equipment and leasehold improvements	5 to 15 years		337,718		335,187
Total property and equipment		$	2,938,154	$	2,948,907