Note B - Acquisition of Veth Propulsion Holding BV - Unaudited Supplemental Pro Forma Information (Details) - Veth Propulsion [Member] $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 29, 2017 USD ($) $ / shares shares
Net sales	$ 59,709
Gross profit (a)	17,189	[1]
Net income attributable to Twin Disc (b)	$ 2,715	[2]
Basic income per share attributable to Twin Disc (in dollars per share) | $ / shares	$ 0.24
Diluted income per share attributable to Twin Disc (in dollars per share) | $ / shares	$ 0.24
Basic (in shares) | shares	11,256
Diluted (in shares) | shares	11,259

[1] Gross profit includes the amortization of the step-up of inventories of $1,171 for the quarter.

[2] In addition to (a), this includes the amortization of intangible assets acquired and interest expense on borrowings under the Credit Agreement net of other expenses, amounting to $1,136, before tax.