Fair Value Disclosures - Additional Information (Detail) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | ||
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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Dec. 31, 2013
WRECO transaction [Member]
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Assets And Liabilities Carrying Value And Fair Value [Line Items] | |||||
Impairment charge of inventory recognized | $ 552,000 | $ 549,000 | $ 1,124,000 | $ 1,245,000 | $ 340,300,000 |
Write off of option deposits and pre-acquisition costs | $ 3,000,000 |