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Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income	$ 2,462us-gaap_NetIncomeLoss	$ 1,978us-gaap_NetIncomeLoss
Weighted average shares outstanding (basic)	8,110us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	8,108us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Impact of common stock equivalents	24us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment	0us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Weighted average shares outstanding (diluted)	8,134us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	8,108us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic earnings per share (usd per share)	$ 0.30us-gaap_EarningsPerShareBasic	$ 0.24us-gaap_EarningsPerShareBasic
Diluted earnings per share (usd per share)	$ 0.30us-gaap_EarningsPerShareDiluted	$ 0.24us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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