Income Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Income Per Common Share [Abstract]
Net income attributed to Landauer, Inc.	$ 4,997	$ 5,153	$ 8,048	$ 10,030
Less: Income allocated to unvested restricted stock	46	43	91	75
Net income available to common stockholders	$ 4,951	$ 5,110	$ 7,957	$ 9,955
Basic weighted averages shares outstanding	9,460	9,417	9,441	9,391
Net (loss) income per share - Basic	$ 0.52	$ 0.54	$ 0.84	$ 1.06
Effect of dilutive securities	41	45	44	47
Diluted weighted averages shares outstanding	9,501	9,462	9,485	9,438
Net (loss) income per share - Diluted	$ 0.52	$ 0.54	$ 0.84	$ 1.05
Dividends paid per share			$ 0.55