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Summary of Properties and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Vessels and related equipment	$ 1,049,058	$ 1,051,558
Other properties and equipment	15,493	13,119
Properties and equipment, gross	1,064,551	1,064,677
Less accumulated depreciation and amortization	141,572	125,716
Properties and equipment, net	$ 922,979	$ 938,961

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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- Definition

Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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