Business Combinations (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	9 Months Ended		0 Months Ended				9 Months Ended
	Nov. 14, 2011	Jun. 30, 2011	Jun. 30, 2012	Nov. 14, 2011 Customer Relationships [Member]	Nov. 14, 2011 Licenses And Patents [Member]	Nov. 14, 2011 Tax Deductible Goodwill [Member]	Nov. 14, 2011 Trademarks And Tradenames [Member]	Jun. 30, 2012 IZI [Member]
Business Acquisition [Line Items]
Business acquisition, cash paid	$ 93,000
Purchase price cash applied to repay outstanding indebtedness	26,941
Deposited purchase price into an escrow account	9,300
Consideration transferred to acquire IZI	94,283
Excess consideration transferred over fair value of net tangible and intangible assets acquired resulted in goodwill	64,069		64,069
Deduction for income tax purposes	64,641
Term of amortization, years	15 years			15 years	7 years	15 years
Business acquisition, intangible assets with indefinite lives							2,000
Business acquisition, intangible assets				23,000	2,000
Revenues								10,454
Net income attributed to Landauer, Inc.								$ 2,719
Business Combination Number Of Acquisitions		2