|
Income taxes - Additional Information (Detail)
|
12 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
|
Jun. 30, 2012
USD ($)
|
Jun. 30, 2010
USD ($)
|
Jun. 30, 2011
USD ($)
|
Jun. 30, 2010
R&D Europe
USD ($)
|
Jun. 30, 2010
R&D Europe
GBP (£)
|
|
| Income Taxes [Line Items] | |||||
| Federal statutory tax rate | 35.00% | ||||
| Dividend declared and paid to Company by subsidiary | $ 74,400,000 | £ 50,000,000 | |||
| Foreign currency exchange transaction loss | 12,800,000 | ||||
| Foreign currency exchange transaction loss, reduction in income tax expense | 4,700,000 | ||||
| Undistributed earnings of Company's foreign subsidiaries | 144,000,000 | ||||
| Unrecognized tax benefits that would affect the effective tax rate if recognized | $ 2,000 | $ 5,000 | $ 3,000 | ||