Document And Entity Information
3 Months Ended
Dec. 31, 2014
Feb. 24, 2015
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Dec. 31, 2014  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2015  
Entity Registrant Name LANDAUER INC  
Trading Symbol ldr  
Entity Central Index Key 0000825410  
Current Fiscal Year End Date --09-30  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   9,560,674