Document and Entity Information	6 Months Ended
	Jun. 30, 2012	Aug. 14, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	KEYSTONE CONSOLIDATED INDUSTRIES INC
Entity Central Index Key	0000055604
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	false
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2012
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		12,101,932