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Goodwill (Tables)
 9 Months Ended
Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
Changes in the carrying amount of goodwill are as follows:
 
Industrial
 
Municipal
 
Products
 
Total
Balance at September 30, 2017
$
128,190

 
$
9,865

 
$
183,858

 
$
321,913

Business combinations and divestitures
2,462

 
(145
)
 
3,757

 
6,074

Measurement period adjustment
(323
)
 
—

 
(314
)
 
(637
)
Foreign currency translation
(2,972
)
 
21

 
(127
)
 
(3,078
)
Balance at June 30, 2018
$
127,357

 
$
9,741

 
$
187,174

 
$
324,272