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Schedule of Balances with Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Due to related parties:
Due from related parties, net of due to related parties	$ 83,081	$ 97,979
Sonatide Marine, Ltd. | ANGOLA
Due from related parties:
Total due from related parties	91,801	109,176
Due to related parties:
Total due to related parties	27,141	29,347
DTDW Holdings, Ltd. | NIGERIA
Due from related parties:
Total due from related parties	32,956	23,775
Due to related parties:
Total due to related parties	$ 14,535	$ 5,625

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- Definition

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date within one year where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

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