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ASSETS HELD FOR SALE (Tables)
 12 Months Ended
Dec. 31, 2017
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]  
Significant Assets Included in Assets Held for Sale
A summary of the significant assets included in assets held for sale as of December 31, 2017, at our South Texas Properties and our Prospect Shipyard is as follows (in thousands):
Assets
South Yard
 
North Yard
 
Prospect Shipyard
 
Consolidated
 
Land
$
3,335

 
$
2,157

 
$
—

 
$
5,492

 
Buildings and improvements
84,282

 
39,548

 
—

 
123,830

 
Machinery and equipment
—

 
69,818

 
2,201

 
72,019

 
Less: accumulated depreciation
(40,838
)
 
(55,629
)
 
(298
)
 
(96,765
)
 
Total assets held for sale
$
46,779

 
$
55,894

 
$
1,903

 
$
104,576