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Discontinued Operations (Tables)
 12 Months Ended
Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]  
Schedule of Discontinued Operations
Operating results for discontinued operations are summarized as follows (in thousands):
 
Years Ended December 31,

2015
 
2014
 
2013
Revenues
$
—

 
$
—

 
$
9,763

Gross loss
—

 
(67
)
 
(4,255
)
Operating expenses
—

 
(5,941
)
 
1,973

Closure charges of welding business
—

 
—

 
5,019

Operating loss
—

 
(6,008
)
 
(11,247
)
Other income (expense)
—

 
(74
)
 
—

Loss before tax benefits
—

 
(6,082
)
 
(10,731
)
Tax benefits
—

 
2,235

 
4,270

Net loss
—

 
(3,847
)
 
(6,461
)