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Shipyard Transaction and Discontinued Operations - Summary of Carrying Values of Major Classes of Assets and Liabilities of Discontinued Operations (Details) $ in Thousands | Dec. 31, 2020 USD ($)
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Current assets of discontinued operations: |
Contract receivables and retainage, net | $ 1,304
Contract assets | 62,423
Prepaid expenses and other assets | 270
Inventory | 105
Assets held for sale | 2,014
Total current assets of discontinued operations | 66,116
Noncurrent assets of discontinued operations: |
Property, plant and equipment, net | 36,280
Other noncurrent assets | 2,889
Total noncurrent assets of discontinued operations | 39,169
Current liabilities of discontinued operations: |
Accounts payable | 57,752
Contract liabilities | 4,867
Accrued expenses and other liabilities | 1,188
Total current liabilities of discontinued operations | $ 63,807

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