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Share-based compensation - Additional Information (Detail) (USD $)
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3 Months Ended | 6 Months Ended | ||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2011
Year
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Dec. 31, 2010
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Weighted average fair value of options granted during the period | $ 15.68 | $ 15.70 | $ 14.90 | $ 15.02 |
| Total intrinsic value of options exercised | $ 0 | $ 1,500,000 | $ 34,000 | $ 1,800,000 |
| Total fair value of options vested | 627,000 | 628,000 | 698,000 | 677,000 |
| Stock-based compensation cost | 858,000 | 714,000 | 1,148,000 | 850,000 |
| Total unrecognized compensation cost related to non-vested stock options | $ 2,300,000 | $ 2,300,000 | ||
| Weighted average period over which the compensation cost is expected to be recognized | 1.4 | |||
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- Definition
Share-based Compensation Arrangement by Share-based Payment Award, Grant Date Fair Value of Options Vested. No definition available.
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- Definition
As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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