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Subsequent Events - Additional Information (Detail) (USD $)
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3 Months Ended | 6 Months Ended | 1 Months Ended | ||||
|---|---|---|---|---|---|---|---|
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Aug. 03, 2013
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Jul. 28, 2012
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Aug. 03, 2013
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Jul. 28, 2012
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Sep. 04, 2013
Subsequent Event
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Aug. 20, 2013
Subsequent Event
Dividend Declared
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Aug. 20, 2013
Subsequent Event
Dividend Paid
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| Subsequent Event [Line Items] | |||||||
| Cash dividend, per share | $ 0.275 | $ 0.150 | $ 0.550 | $ 0.300 | $ 0.275 | ||
| Cash dividend, payment date | Sep. 19, 2013 | ||||||
| Cash dividend, date of record | Sep. 03, 2013 | ||||||
| Share repurchase, shares | 0.3 | ||||||
| Share repurchase, average Price Per Share | $ 50.27 | ||||||