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Discontinued Operations - Additional Information (Detail) (USD $)
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0 Months Ended | 3 Months Ended | 12 Months Ended | ||
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Jul. 19, 2013
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Sep. 30, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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Jul. 19, 2013
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| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Net cash proceeds from sale of discontinued operations | $ 1,100,000 | $ 304,000 | $ 1,058,000 | ||
| Discontinued operations, net carrying value of liabilities net of goodwill | 435,000 | ||||
| Net gain from sale of discontinued operations | 1,500,000 | 422,000 | 1,492,000 | ||
| Gain on sale of discontinued operations, net of tax | $ 278,000 | $ 278,000 | $ 930,000 | ||