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Contracts in Progress (Tables)
 9 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
Schedule Of Contracts In Progress [Table Text Block]
(
in thousands
)
 
September 30, 2018
 
 
December 31, 2017
 
Revenue earned on uncompleted contracts
 
$
649,582
 
 
$
557,164
 
Less: Billings to date
 
 
(669,595
)
 
 
(552,701
)
Net underbilling (overbilling)
 
$
(20,013
)
 
 
4,463
 
 
 
 
 
 
 
 
 
 
The above is reflected in the accompanying Condensed Consolidated Balance Sheets as follows:
 
 
 
 
 
 
 
 
Costs and estimated earnings in excess of billing on uncompleted contracts
 
$
32,407
 
 
$
33,006
 
Billings in excess of costs and estimated earnings on uncompleted contracts
 
 
(52,420
)
 
 
(28,543
)
Net underbilling (overbilling)
 
$
(20,013
)
 
$
4,463