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Postemployment Benefits - Additional Information (Detail)
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1 Months Ended | 9 Months Ended | 18 Months Ended | 9 Months Ended |
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Sep. 30, 2012
employees
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Jun. 30, 2013
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Jun. 30, 2013
Minimum
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Jun. 30, 2013
Maximum
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| Schedule of Postemployment Benefits [Line Items] | ||||
| Number of impacted employees due to reduction in workforce | 50 | |||
| Period for payment of post employment benefit | 0 years 1 month | 0 years 12 months | ||
| Payment of post employment benefit expiry Date | 2014-03 |