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Goodwill and Intangible Assets (Tables)
 3 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
 
 
Commercial & Industrial
 
 
Communications
 
Infrastructure Solutions
 
 
Residential
 
Total
Goodwill at September 30, 2019
 
$
6,976

 
 
$
2,816

 
$
30,812

 
 
$
10,018

 
$
50,622

Divestitures
 
 
—

 
 
 
—

 
 
—

 
 
 
—

 
 
—

Adjustments
 
 
—

 
 
 
—

 
 
—

 
 
 


 
 
—

Goodwill at December 31, 2019
 
$
6,976

 
 
$
2,816

 
$
30,812

 
 
$
10,018

 
$
50,622
Schedule of Finite-Lived Intangible Assets [Table Text Block]
 
 
 
Estimated Useful Lives (in Years)
 
December 31, 2019
 
 
 
 
 
Gross Carrying Amount
 
 
Accumulated Amortization
 
Net
Trademarks/trade names
 
5-20
 
$
5,044

 
$
(1,328
)
 
$
3,716

Technical library
 
20
 
 
400

 
 
(126
)
 
 
274

Customer relationships
 
6-15
 
 
33,539

 
 
(11,825
)
 
 
21,714

Non-competition arrangements
 
5
 
 
40

 
 
(11
)
 
 
29

Backlog and construction contracts
 
1
 
 
251

 
 
(244
)
 
 
7

Total intangible assets
 
 
 
$
39,274

 
$
(13,534
)
 
$
25,740



 
 
 
Estimated Useful Lives (in Years)
 
September 30, 2019
 
 
 
 
 
Gross Carrying Amount
 
 
Accumulated Amortization
 
Net
Trademarks/trade names
 
5-20
 
$
5,084

 
$
(1,267
)
 
$
3,817

Technical library
 
20
 
 
400

 
 
(121
)
 
 
279

Customer relationships
 
6-15
 
 
33,539

 
 
(11,051
)
 
 
22,488

Non-competition arrangements
 
5
 
 
40

 
 
(9
)
 
 
31

Backlog and construction contracts
 
1
 
 
599

 
 
(591
)
 
 
8

Total intangible assets
 
 
 
$
39,662

 
$
(13,039
)
 
$
26,623