Dividend - Additional Information (Detail) (USD $)
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3 Months Ended | 9 Months Ended |
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Mar. 31, 2013
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Mar. 31, 2013
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Disclosure Of Dividends [Line Items] | ||
Cash dividend declared monthly (per share) | $ 0.005 | $ 0.005 |
Previous [Member]
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Disclosure Of Dividends [Line Items] | ||
Cash dividend declared monthly (per share) | $ 0.020 |