Assets Held for Sale - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2014 |
Jun. 30, 2015 |
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| Property, Plant and Equipment Assets Held-for-sale Disclosure [Abstract] | ||
| Fair value of assets held for sale | $ 10.3 | |
| Percentage of fair value of assets held for sale under sales assistance agreement | 50.00% | |
| Renewal term of sales assistance agreement | 6 months |
| X | ||||||||||
- Definition Percentage Of Fair Value Of Assets Held For Sale Under Sales Assistance Agreement No definition available.
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| X | ||||||||||
- Definition Renewal term of agreement. No definition available.
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| X | ||||||||||
- Definition Fair value portion of assets classified as held for sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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