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Segment Information (Tables)
 6 Months Ended
Jun. 30, 2016
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
The information in the following table was derived from internal financial reports used for corporate management purposes:
 
 
 
Three months ended
 
Six months ended
 
 
 
June 30,
 
June 30,
 
(In thousands)
 
2016
 
2015
 
2016
 
2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Contract revenues:
 
 
 
 
 
 
 
 
 
 
 
 
 
T&D
 
$
178,629
 
$
200,583
 
$
361,603
 
$
389,806
 
C&I
 
 
83,305
 
 
75,905
 
 
153,965
 
 
130,830
 
 
 
$
261,934
 
$
276,488
 
$
515,568
 
$
520,636
 
Income from operations:
 
 
 
 
 
 
 
 
 
 
 
 
 
T&D
 
$
15,585
 
$
16,713
 
$
26,254
 
$
33,547
 
C&I
 
 
2,434
 
 
3,925
 
 
4,590
 
 
6,760
 
General Corporate
 
 
(8,877)
 
 
(7,614)
 
 
(18,395)
 
 
(15,686)
 
 
 
$
9,142
 
$
13,024
 
$
12,449
 
$
24,621