Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 29, 2013	Mar. 30, 2012	Mar. 29, 2013 Segment	Mar. 30, 2012	Jun. 30, 2012
Business Segments [Abstract]
Number of reportable segments			2
Segment Reporting Information [Line Items]
Net sales	$ 68,232	$ 95,490	$ 209,351	$ 259,761
Net (loss) earnings attributable to Twin Disc	(757)	9,984	3,835	25,480
Assets	295,129		295,129		303,832
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Net (loss) earnings attributable to Twin Disc	(2,787)	(2,106)	(8,787)	(6,816)
Assets	(46,708)		(46,708)		(26,541)
Manufacturing Segment [Member]
Segment Reporting Information [Line Items]
Net sales	56,678	86,659	181,874	235,686
Net (loss) earnings attributable to Twin Disc	(75)	10,032	7,814	27,009
Assets	279,562		279,562		272,098
Manufacturing Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(15,124)	(20,068)	(54,203)	(62,017)
Distribution Segment [Member]
Segment Reporting Information [Line Items]
Net sales	31,237	30,990	95,982	94,166
Net (loss) earnings attributable to Twin Disc	2,105	2,058	4,808	5,287
Assets	62,275		62,275		58,275
Distribution Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	$ (4,559)	$ (2,091)	$ (14,302)	$ (8,074)