Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2012	Apr. 30, 2012	Sep. 30, 2011
Document and Entity Information
Entity Registrant Name	CONSOLIDATED GRAPHICS INC /TX/
Entity Central Index Key	0000921500
Document Type	10-K
Document Period End Date	Mar. 31, 2012
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 325,332,344
Entity Common Stock, Shares Outstanding		10,252,319
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY