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Business Segments (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Dec. 28, 2012
Dec. 30, 2011
Jun. 30, 2012
Business Segments [Abstract]          
Number of reportable segments     2    
Segment Reporting Information [Line Items]          
Net sales $ 72,325 $ 82,941 $ 141,118 $ 164,271  
Net earnings attributable to Twin Disc 3,360 5,840 4,591 15,496  
Assets 299,576   299,576   303,832
Corporate and eliminations [Member]
          
Segment Reporting Information [Line Items]          
Net earnings attributable to Twin Disc (3,246) (3,484) (6,001) (4,712)  
Assets (46,335)   (46,335)   (26,541)
Manufacturing segment [Member]
          
Segment Reporting Information [Line Items]          
Net sales 66,914 78,044 125,196 149,027  
Net earnings attributable to Twin Disc 5,055 8,259 7,889 16,978  
Assets 282,930   282,930   272,098
Manufacturing segment [Member] | Inter/Intra segment elimination [Member]
          
Segment Reporting Information [Line Items]          
Net sales (23,522) (22,280) (39,080) (41,949)  
Distribution segment [Member]
          
Segment Reporting Information [Line Items]          
Net sales 33,742 29,082 64,745 63,177  
Net earnings attributable to Twin Disc 1,551 1,065 2,703 3,230  
Assets 62,981   62,981   58,275
Distribution segment [Member] | Inter/Intra segment elimination [Member]
          
Segment Reporting Information [Line Items]          
Net sales $ (4,809) $ (1,905) $ (9,743) $ (5,984)