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Summary of Significant Accounting Policies (Details 2) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share Basic And Diluted [Line Items] |  |  |
Weighted average number of common shares outstanding | 15,121,212 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 13,314,989 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 11,321,498 us-gaap_WeightedAverageNumberOfSharesIssuedBasic
Less: Unvested restricted stock | (238,626)us-gaap_WeightedAverageNumberOfSharesRestrictedStock | (249,082)us-gaap_WeightedAverageNumberOfSharesRestrictedStock | (250,180)us-gaap_WeightedAverageNumberOfSharesRestrictedStock
Weighted average number of common shares outstanding used in basic earnings per share | 14,882,586 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 13,065,907 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 11,071,318 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Weighted average number of common shares outstanding used in basic earnings per share | 14,882,586 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 13,065,907 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 11,071,318 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive securities: restricted stock | 84,309 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 91,598 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 65,592 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted average number of common shares outstanding used in diluted earnings per share | 14,966,895 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 13,157,505 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 11,136,910 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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