Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jul. 01, 2023
Segment information:
Goodwill	$ 50,824	$ 32,150
Goodwill impairment	0	0
Spinnaker
Segment information:
Goodwill	18,674		$ 18,674
Technical Services
Segment information:
Goodwill	49,666	30,992
Technical Services | Spinnaker
Segment information:
Goodwill	18,674
Support Services
Segment information:
Goodwill	$ 1,158	$ 1,158