Document And Entity Information (USD $)	12 Months Ended
	Sep. 30, 2013	Dec. 10, 2013	Mar. 31, 2013
Document And Entity Information [Abstract]
Document Type	10-K/A
Amendment Flag	true
Document Period End Date	Sep. 30, 2013
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2013
Entity Registrant Name	LANDAUER INC
Trading Symbol	ldr
Entity Central Index Key	0000825410
Current Fiscal Year End Date	--09-30
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 528,000,000
Entity Common Stock, Shares Outstanding		9,540,186
Amendment Description	EXPLANATORY NOTE This Form 10-K/A (the "Amended 10-K") amends our Form 10-K for the period ended September 30, 2013, which was filed with the Securities and Exchange Commission on December 16, 2013 (the "Original 10-K"). We are filing this Amended 10-K to amend our evaluation and current developments of controls and procedures in Item 9A. At the time that our Annual Report on Form 10-K for the year ended September 30, 2013 was filed, our CEO and CFO concluded that our disclosure controls and procedures were effective as of September 30, 2013. Subsequent to that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were not effective as of September 30, 2013 and subsequent periods through March 31, 2014 because of the material weakness in our internal control over financial reporting related to the preparation and review of our Consolidated Statement of Cash Flows. Notwithstanding the identified material weakness, management believes the consolidated financial statements included in this Annual Report on Form 10-K/A fairly state in all material respects our financial condition, results of operations and cash flows at and for the periods presented in accordance with U.S. GAAP. This Amended 10-K does not reflect events occurring after the filing of the Original 10-K and does not modify or update the disclosure in the Original 10-K, other than for (i) certain revisions to the Consolidated Statements of Cash Flows, (ii) the evaluation and current developments of controls and procedures in Item 9A, (iii) the filing of consents of our independent registered public accounting firm, and (iv) the filing of certifications of our principal executive officer and principal financial officer pursuant to Rule 13a-14 of the Securities Exchange Act of 1934 and Section 906 of the Sarbanes-Oxley Act of 2002.