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Net Income per Common Share (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net income	$ 3,196,000us-gaap_NetIncomeLoss	$ 2,120,000us-gaap_NetIncomeLoss
Weighted average common shares outstanding — basic	7,561,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	7,415,000us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive securities	$ 46,000us-gaap_DilutiveSecurities	$ 53,000us-gaap_DilutiveSecurities
Weighted average common and potentially issuable common shares outstanding — diluted	7,607,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	7,468,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Basic net income per common share (USD per share)	$ 0.42us-gaap_EarningsPerShareBasic	$ 0.29us-gaap_EarningsPerShareBasic
Diluted net income per common share (USD per share)	$ 0.42us-gaap_EarningsPerShareDiluted	$ 0.28us-gaap_EarningsPerShareDiluted

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- Definition

Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities.

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