Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2013	May 10, 2013	Sep. 28, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	BLACK BOX CORP
Entity Central Index Key	0000849547
Document Type	10-K
Document Period End Date	Mar. 31, 2013
Amendment Flag	false
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		16,132,572
Entity Public Float			$ 417,165,079