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Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member]
--- | --- | --- | --- | --- | ---
Balance, value at Dec. 31, 2011 | $ 264,004us-gaap_StockholdersEquity | $ 9,684us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 24,552us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 227,494us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 2,274us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, shares at Dec. 31, 2011 |  | 18,592,827us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 22,318us-gaap_NetIncomeLoss | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 22,318us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Unrealized loss on investment, net of tax effect | 36us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 36us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Reclassification adjustment for gain realized on investment, net of tax effect of $805 | 0us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax |  |  |  |
Share-based compensation | 436us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 564us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (128)us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options and similar instruments, value | 370us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 23us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 347us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options and similar instruments, shares |  | 44,784us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Employee stock purchase plan, value | 588us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan | 15us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 573us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Employee stock purchase plan, shares | 29,468us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans | 29,468us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividend reinvestment and stock purchase plan, value | 83us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan | 2us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 81us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Dividend reinvestment and stock purchase plan, shares |  | 3,487us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividends | (13,231)us-gaap_Dividends | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (13,231)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, value at Dec. 31, 2012 | 274,604us-gaap_StockholdersEquity | 9,724us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 26,117us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 236,453us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 2,310us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, shares at Dec. 31, 2012 |  | 18,670,566us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 22,384us-gaap_NetIncomeLoss | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 22,384us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Unrealized loss on investment, net of tax effect | 1,077us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 1,077us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Reclassification adjustment for gain realized on investment, net of tax effect of $805 | 0us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax |  |  |  |
Share-based compensation | 784us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 912us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (128)us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options and similar instruments, value | 69us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 23us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 46us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options and similar instruments, shares |  | 43,665us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Employee stock purchase plan, value | 722us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan | 16us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 706us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Employee stock purchase plan, shares | 30,869us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans | 30,869us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividend reinvestment and stock purchase plan, value | 84us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan | 2us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 82us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Dividend reinvestment and stock purchase plan, shares |  | 3,111us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued, shares |  | 1,421,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued | 35,894us-gaap_StockIssuedDuringPeriodValueNewIssues | 740us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 35,154us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Dividends | (14,443)us-gaap_Dividends | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (14,443)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, value at Dec. 31, 2013 | 321,175us-gaap_StockholdersEquity | 10,505us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 63,017us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 244,266us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 3,387us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, shares at Dec. 31, 2013 | 20,169,211us-gaap_CommonStockSharesOutstanding | 20,169,211us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 51,806us-gaap_NetIncomeLoss | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 51,806us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Unrealized loss on investment, net of tax effect | 301us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 301us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Reclassification adjustment for gain realized on investment, net of tax effect of $805 | (1,171)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax | 0us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (1,171)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Share-based compensation | 909us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,031us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (122)us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options and similar instruments, value | 1,439us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation | 42us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,397us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Exercise of stock options and similar instruments, shares |  | 80,796us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Employee stock purchase plan, value | 839us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan | 19us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 820us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Employee stock purchase plan, shares | 35,682us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans | 35,682us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividend reinvestment and stock purchase plan, value | 34us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan | 1us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 33us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Dividend reinvestment and stock purchase plan, shares |  | 1,151us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Dividends | (15,177)us-gaap_Dividends | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (15,177)us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 0us-gaap_Dividends / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, value at Dec. 31, 2014 | $ 360,155us-gaap_StockholdersEquity | $ 10,567us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 66,298us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 280,773us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 2,517us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember
Balance, shares at Dec. 31, 2014 | 20,286,840us-gaap_CommonStockSharesOutstanding | 20,286,840us-gaap_CommonStockSharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |

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