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	2,369			—		5,863			8,232
Measurement period adjustment	—			—		(314		)	(314		)
Foreign currency translation	(373		)	96		344			67
Balance at March 31, 2018	$	130,186		$	9,961	$	189,751		$	329,898

As of September 30, 2017 and March 31, 2018, $139,581 and $139,340, respectively, of goodwill is deductible for tax purposes.

The Neptune Benson reporting unit fair value excess was approximately 3.0% above the carrying value as of the date of valuation on July 1, 2017. The Company continues to monitor this reporting unit and noted no events that would cause a revaluation during the three months ending March 31, 2018.

All other reporting units significantly exceeded their carrying value and as such, no further analysis was performed.