Income Taxes - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Income Tax Disclosure [Abstract] | |||
Provision for income taxes | $ 116,000 | $ 1,688,000 | $ 2,178,000 |
Charitable contribution, expiry period | 2018 | ||
Low-income housing, expiry period | 2033 | ||
Net operating loss carryforwards, expiry period | 2032 | ||
Cumulative loss position, significant negative evidence against the realizability of the deferred tax asset | 3 years | 3 years |