Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements Of Income [Abstract]
Net revenues	$ 37,082	$ 39,094	$ 73,763	$ 75,763
Costs and expenses:
Cost of sales	17,050	16,029	33,613	30,935
Selling, general, and administrative	12,578	12,604	25,969	24,965
Acquisition and reorganization costs	300	312	300	2,161
Costs and expenses	29,928	28,945	59,882	58,061
Operating income	7,154	10,149	13,881	17,702
Equity in income of joint ventures	556	1,067	2,084	1,871
Interest expense, net	(1,081)	(863)	(2,114)	(1,453)
Other income (expense), net	224	(9)	319	50
Income before taxes	6,853	10,344	14,170	18,170
Income taxes	1,620	3,104	3,894	5,846
Net income	5,233	7,240	10,276	12,324
Less: Net income attributed to noncontrolling interest	80	130	246	289
Net income attributed to Landauer, Inc.	$ 5,153	$ 7,110	$ 10,030	$ 12,035
Net income per share attributable to Landauer, Inc. shareholders:
Basic	$ 0.54	$ 0.76	$ 1.06	$ 1.28
Weighted average basic shares outstanding	9,417	9,361	9,391	9,347
Diluted	$ 0.54	$ 0.75	$ 1.05	$ 1.27
Weighted average diluted shares outstanding	9,462	9,402	9,438	9,387
Dividends paid per share	$ 0.55	$ 0.55	$ 1.10	$ 1.10