Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2012
Consolidated Statements Of Operations [Abstract]
Service revenues			$ 31,800		$ 32,870		$ 31,745				$ 31,538		$ 32,480		$ 31,416						$ 127,698		$ 126,528		$ 124,800
Product revenues			4,068		6,184		6,402				4,768		4,602		5,384						27,364		23,162		27,302
Net revenues	41,993		35,868		39,054		38,147		39,502		36,306		37,082		36,800						155,062		149,690		152,102
Costs and expenses:
Service costs			16,109		15,155		15,010				15,492		14,881		14,326						61,649		59,931		53,619
Product costs			1,821		3,177		3,375				2,264		2,213		2,368						12,506		11,163		11,816
Total cost of sales			17,930		18,332		18,385				17,756		17,094		16,694						74,155		71,094		65,435
Gross profit	22,485		17,938		20,722		19,762		19,952		18,550		19,988		20,106						80,907		78,596		86,667
Selling, general, and administrative			13,819		13,750		14,226				12,615		12,643		13,592						54,904		51,115		51,218
Goodwill and intangible asset impairment charge			62,188								22,700								62,188	22,700	62,188		22,700
Acquisition, reorganization and nonrecurring costs			1,558		109		111				142		300								3,802		1,392		4,299
Abandonment charges																									3,443
Operating (loss) income	7,352	[1]	(59,627)	[1]	6,863	[1]	5,425	[1]	6,737	[1]	(16,907)	[1]	7,045	[1]	6,514	[1]					(39,987)	[1]	3,389	[1]	27,707
Equity in income of joint ventures			256		535		1,281				12		143		1,057						2,939		3,251		3,103
Interest expense, net			(867)		(1,014)		(937)				(1,185)		(1,107)		(1,065)						(3,424)		(4,311)		(3,435)
Other (expense) income, net			(21)		5		159				113		224		168						(26)		747		205
Income (loss) before taxes			(60,259)		6,389		5,928				(17,967)		6,305		6,674						(40,498)		3,076		27,580
Income tax (benefit) expense			(24,225)		1,913		1,899				(4,449)		1,799		2,244						(15,800)		(560)		8,206
Net (loss) income			(36,034)		4,476		4,029				(13,518)		4,506		4,430		8,505	8,936	(27,529)	(4,582)	(24,698)		3,636		19,374
Less: Net income attributed to noncontrolling interest			301		(38)		208				145		76		173						505		854		828
Net (loss) income attributed to Landauer, Inc.	$ 2,797		$ (36,335)		$ 4,514		$ 3,821		$ 7,758		$ (13,663)		$ 4,430		$ 4,257						$ (25,203)		$ 2,782		$ 18,546
Net (loss) income per share attributed to Landauer, Inc. shareholders:
Basic	$ 0.31		$ (3.83)		$ 0.47		$ 0.40		$ 0.82		$ (1.45)		$ 0.46		$ 0.45						$ (2.65)		$ 0.28		$ 1.96
Weighted average basic shares outstanding	9,524		9,482		9,460		9,422		9,462		9,439		9,417		9,336						9,524		9,434		9,389
Diluted	$ 0.31		$ (3.83)		$ 0.47		$ 0.40		$ 0.81		$ (1.45)		$ 0.46		$ 0.45						$ (2.65)		$ 0.27		$ 1.95
Weighted average diluted shares outstanding	9,572		9,482		9,501		9,467		9,506		9,439		9,462		9,385						9,524		9,482		9,437

[1] The third quarters of fiscal 2014 and 2013 include goodwill and intangibles impairment charges of $62,188 and $22,700, respectively.