Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015 Segment	Mar. 28, 2014	Jun. 30, 2014
Business Segments [Abstract]
Number of reportable segments			2
Segment Reporting Information [Line Items]
Net sales	$ 60,941	$ 60,705	$ 198,456	$ 190,343
Net earnings (loss) attributable to Twin Disc	2,946	(475)	10,736	1,320
Assets	246,376		246,376		266,985
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Net earnings (loss) attributable to Twin Disc	(1,984)	(1,982)	(6,354)	(7,160)
Assets	(57,340)		(57,340)		(44,900)
Manufacturing Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(16,441)	(18,233)	(50,902)	(54,452)
Manufacturing Segment [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net sales	54,519	52,957	178,143	163,224
Net earnings (loss) attributable to Twin Disc	3,589	(9)	12,793	3,662
Assets	247,531		247,531		254,652
Distribution Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(3,398)	(2,460)	(8,032)	(8,447)
Distribution Segment [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net sales	26,261	28,441	79,247	90,018
Net earnings (loss) attributable to Twin Disc	1,341	1,516	4,297	4,818
Assets	$ 56,185		$ 56,185		$ 57,233