During the three months ended June 30, 2021, we revised our segment structure creating three reportable segments: Contractor Solutions, Specialized Reliability Solutions and Engineered Building Solutions. As part of our segment realignment, we changed our reporting units and reallocated existing goodwill to each of the new reportable segments and associated reporting units, based on management's estimate of the relative fair value of each reporting unit. The result of this reallocation of goodwill has been recast, by reportable segment, as of March 31, 2021.


	Contractor Solutions		Specialized Reliability Solutions		Engineered Building Solutions		Total
Balance at April 1, 2022	$	190,152	$	9,499	$	25,007	$	224,658
Falcon acquisition	17,417		—		—		17,417
CG and ACG acquisitions	1,686		—		—		1,686
Shoemaker acquisition	6		—		—		6
Currency translation	(101)		(221)		(705)		(1,027)
Balance at March 31, 2023	$	209,160	$	9,278	$	24,302	$	242,740
Dust Free acquisition	3,951		—		—		3,951
Falcon acquisition	85		—		—		85
CG and ACG acquisitions	107		—		—		107
Other acquisitions	261		—		—		261
Currency translation	(20)		80		(13)		47
Balance at March 31, 2024	$	213,544	$	9,358	$	24,289	$	247,191

The following table provides information about our intangible assets for the years ended March 31, 2024 and 2023 (in thousands, except years):


		March 31, 2024				March 31, 2023
	Wtd Avg Life (Years)	Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
Finite-lived intangible assets:
Patents	11	$	15,084	$	(9,306)	$	13,608	$	(8,546)
Customer lists and amortized trademarks	14	346,136		(103,407)		324,472		(81,901)
Non-compete agreements	6	1,000		(453)		950		(272)
Other	10	6,275		(2,649)		6,377		(2,235)
		$	368,495	$	(115,815)	$	345,407	$	(92,954)
Trade names and trademarks not being amortized (a):		$	66,139	$	—	$	66,450	$	—

(a) In the fiscal quarter ended March 31, 2024, we recorded a $1.5 million impairment relating to a trademark, included in selling, general and administrative expenses, for our Contractor Solutions segment.

Amortization expense for the years ended March 31, 2024, 2023 and 2022 was $22.9 million, $22.1 million and $24.8 million (including the amortization of inventory purchase accounting adjustment of $3.9 million) respectively. The following table presents the estimated future amortization of finite-lived intangible assets for the next five fiscal years ending March 31 (in thousands):