Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements Of Income [Abstract]
Net revenues	$ 36,669	$ 28,438
Costs and expenses:
Cost of sales	14,906	11,083
Selling, general and administrative	12,361	9,131
Acquisition and reorganization costs	1,849	97
Costs and expenses	29,116	20,311
Operating income	7,553	8,127
Equity in income of joint ventures	804	511
Interest expense, net	(590)	(9)
Other income, net	59	101
Income before taxes	7,826	8,730
Income taxes	2,742	2,737
Net income	5,084	5,993
Less: Net income attributed to noncontrolling interest	159	174
Net income attributed to Landauer, Inc.	$ 4,925	$ 5,819
Net income per share attributable to Landauer, Inc. shareholders:
Basic	$ 0.52	$ 0.62
Weighted average basic shares outstanding	9,348	9,319
Diluted	$ 0.52	$ 0.62
Weighted average diluted shares outstanding	9,385	9,365