Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 23, 2014
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Trading Symbol	IEX
Entity Registrant Name	IDEX CORP /DE/
Entity Central Index Key	0000832101
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		80,618,840