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Summary of Provisional Amounts for Assets Acquired and Liabilities Assumed (Detail) - GulfMark $ in Thousands | Dec. 31, 2018 USD ($)
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Assets: |
Current assets | $ 77,942
Property and equipment | 360,701
Other assets | 779
Liabilities: |
Current liabilities | 33,881
Long term debt | 100,000
Other liabilities | 20,049
Net assets acquired | $ 285,492

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