Document and Entity Information	3 Months Ended
	May 04, 2013	May 30, 2013
Entity Information [Line Items]
Entity Registrant Name	BANK JOS A CLOTHIERS INC /DE/
Entity Central Index Key	0000920033
Current Fiscal Year End Date	--02-01
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	May 04, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		27,969,969