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