Basis Of Presentation And Consolidation (Consolidated Statements Of Income) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Service revenues	$ 32,057	$ 31,745
Product revenues	5,490	6,402
Net revenues	37,547	38,147
Costs and expenses:
Cost of Services	15,634	15,010
Cost of Goods Sold	2,117	3,375
Total cost of sales	17,751	18,385
Gross profit	19,796	19,762
Selling, general, and administrative	13,655	14,226
Acquisition, reorganization and nonrecurring costs		111
Operating income	6,141	5,425
Equity in income of joint ventures	696	1,281
Interest expense, net	(953)	(937)
Other (expense) income, net	251	159
Income before taxes	6,135	5,928
Income tax expense	1,610	1,899
Net loss	4,525	4,029
Less: Net income attributed to noncontrolling interest	148	208
Net loss attributed to Landauer, Inc.	4,377	3,821
Net loss per share attributable to Landauer, Inc. shareholders:
Basic	$ 0.46	$ 0.40
Weighted average basic shares outstanding	9,446	9,422
Diluted	$ 0.46	$ 0.40
Weighted average diluted shares outstanding	9,474	9,467
As Previously Reported [Member]
Service revenues		31,894
Product revenues		5,811
Net revenues		37,705
Costs and expenses:
Cost of Services		15,049
Cost of Goods Sold		3,158
Total cost of sales		18,207
Gross profit		19,498
Selling, general, and administrative		14,362
Acquisition, reorganization and nonrecurring costs		111
Operating income		5,025
Equity in income of joint ventures		573
Interest expense, net		(892)
Other (expense) income, net		37
Income before taxes		4,743
Income tax expense		1,496
Net loss		3,247
Less: Net income attributed to noncontrolling interest		196
Net loss attributed to Landauer, Inc.		3,051
Net loss per share attributable to Landauer, Inc. shareholders:
Basic		$ 0.32
Weighted average basic shares outstanding		9,422
Diluted		$ 0.32
Weighted average diluted shares outstanding		9,467
Adjustment [Member]
Costs and expenses:
Equity in income of joint ventures		708
Income before taxes		1,185
Income tax expense		403
Less: Net income attributed to noncontrolling interest		12
Net loss attributed to Landauer, Inc.		$ 770
Net loss per share attributable to Landauer, Inc. shareholders:
Diluted		$ 0.08