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Capitalization of Interest - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
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Dec. 31, 2014
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| Debt Disclosure [Abstract] | |
| Interest expense | $ 1.2us-gaap_InterestCostsCapitalized |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of interest capitalized during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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