Document and Entity Information	3 Months Ended
	Mar. 31, 2014	May 01, 2014
Document and Entity Information
Entity Registrant Name	UNITED STATES LIME & MINERALS INC
Entity Central Index Key	0000082020
Document Type	10-Q
Document Period End Date	Mar. 31, 2014
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		5,576,909
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1