Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Jun. 30, 2011
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowances for doubtful accounts	$ 798	$ 728
Property, plant and equipment, accumulated depreciation	70,892	50,007
Intangible assets, accumulated amortization	$ 42,017	$ 37,118
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	45,002,304	45,152,805
Common stock, shares outstanding	45,002,304	45,152,805
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury shares, shares outstanding	13,455,090	13,274,434