Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 26, 2014	Dec. 27, 2013	Dec. 26, 2014 Segment	Dec. 27, 2013	Jun. 30, 2014
Business Segments [Abstract]
Number of reportable segments			2
Segment Reporting Information [Line Items]
Net sales	$ 72,691	$ 63,212	$ 137,515	$ 129,638
Net earnings attributable to Twin Disc	3,747	518	7,790	1,795
Assets	255,039		255,039		266,985
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Net earnings attributable to Twin Disc	(2,064)	(2,557)	(4,370)	(5,178)
Assets	(53,505)		(53,505)		(44,900)
Manufacturing Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(17,067)	(21,088)	(34,461)	(36,220)
Manufacturing Segment [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net sales	63,350	57,010	123,624	110,268
Net earnings attributable to Twin Disc	4,034	1,653	9,204	3,670
Assets	252,529		252,529		254,652
Distribution Segment [Member] | Inter/Intra Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(2,567)	(3,273)	(4,634)	(5,987)
Distribution Segment [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Net sales	28,975	30,563	52,986	61,577
Net earnings attributable to Twin Disc	1,777	1,422	2,956	3,303
Assets	$ 56,015		$ 56,015		$ 57,233