Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 26, 2014 Segment	Sep. 27, 2013	Jun. 30, 2014
Business Segments [Abstract]
Number of reportable segments	2
Segment Reporting Information [Line Items]
Net sales	$ 64,824	$ 66,426
Net earnings attributable to Twin Disc	4,043	1,277
Assets	263,551		266,985
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Net earnings attributable to Twin Disc	(2,306)	(2,621)
Assets	(51,522)		(44,900)
Manufacturing Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(17,394)	(13,768)
Manufacturing Segment [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Net sales	60,274	53,258
Net earnings attributable to Twin Disc	5,171	2,017
Assets	258,867		254,652
Distribution Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(2,067)	(4,078)
Distribution Segment [Member] | Reportable Segment [Member]
Segment Reporting Information [Line Items]
Net sales	24,011	31,014
Net earnings attributable to Twin Disc	1,178	1,881
Assets	$ 56,206		$ 57,233