CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Dec. 28, 2012	Jun. 30, 2012
Twin Disc shareholders' equity:
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	13,099,468	13,099,468
Common stock, no par value (in dollars per share)	$ 0	$ 0
Treasury stock, shares (in shares)	1,855,984	1,794,981