Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the nine months ended September 30, 2021, by reportable business segment, were as follows:

	FMT		HST		FSDP		IDEX
Goodwill	$	670,442	$	1,012,448	$	413,315	$	2,096,205
Accumulated goodwill impairment losses	(20,721)		(149,820)		(30,090)		(200,631)
Balance at December 31, 2020	649,721		862,628		383,225		1,895,574
Foreign currency translation	(7,132)		(14,168)		(7,405)		(28,705)
Acquisitions	59,481		271,268		—		330,749
Disposition of businesses	—		(129)		—		(129)
Acquisition adjustments	(405)		—		—		(405)
Balance at September 30, 2021	$	701,665	$	1,119,599	$	375,820	$	2,197,084

Schedule of Gross Carrying Value and Accumulated Amortization For Each Major Class of Intangible Asset

The following table provides the gross carrying value and accumulated amortization for each major class of intangible asset at September 30, 2021 and December 31, 2020:

	At September 30, 2021							At December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net		Weighted Average Life	Gross Carrying Amount		Accumulated Amortization		Net
Amortized intangible assets:
Patents	$	3,152	$	(1,968)	$	1,184	10	$	3,030	$	(1,740)	$	1,290
Trade names	148,258		(76,161)		72,097		15	130,793		(72,685)		58,108
Customer relationships	495,680		(134,636)		361,044		13	318,350		(120,294)		198,056
Unpatented technology	145,175		(57,034)		88,141		13	122,287		(55,131)		67,156
Other	—		—		—		—	700		(647)		53
Total amortized intangible assets	792,265		(269,799)		522,466			575,160		(250,497)		324,663
Indefinite-lived intangible assets:
Banjo trade name	62,100		—		62,100			62,100		—		62,100
Akron Brass trade name	28,800		—		28,800			28,800		—		28,800
Total intangible assets	$	883,165	$	(269,799)	$	613,366		$	666,060	$	(250,497)	$	415,563