Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements Of Income [Abstract]
Net revenues	$ 39,205	$ 29,158	$ 114,968	$ 89,923
Costs and expenses:
Cost of sales	17,357	12,077	48,292	34,764
Selling, general and administrative	12,251	9,231	37,216	27,090
Acquisition and reorganization costs	348	18	2,509	230
Costs and expenses	29,956	21,326	88,017	62,084
Operating income	9,249	7,832	26,951	27,839
Equity in income of joint ventures	684	575	2,555	1,701
Interest income (expense), net	(1,113)	14	(2,566)	14
Other income (expense), net	(50)	(65)	0	(48)
Income before taxes	8,770	8,356	26,940	29,506
Income taxes	2,014	2,667	7,860	9,698
Net income	6,756	5,689	19,080	19,808
Less: Net income attributed to noncontrolling interest	190	153	479	456
Net income attributed to Landauer, Inc.	$ 6,566	$ 5,536	$ 18,601	$ 19,352
Net income per share attributable to Landauer, Inc. shareholders:
Basic	$ 0.70	$ 0.59	$ 1.98	$ 2.06
Weighted average basic shares outstanding	9,371	9,340	9,357	9,330
Diluted	$ 0.69	$ 0.59	$ 1.97	$ 2.05
Weighted average diluted shares outstanding	9,412	9,386	9,397	9,376