Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 17, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Trading Symbol	LDL
Entity Common Stock, Shares Outstanding		17,064,494
Entity Registrant Name	LYDALL INC /DE/
Entity Central Index Key	0000060977
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer