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Earnings Per Share Securities Excluded Due to Exercise Price Exceeding Average Price During Period (Details)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Shares Excluded Due to Exercise Price Exceeding Average Price During Period [Line Items]    
Shares Excluded Due to Exercise Price Exceeding Average Price During Period 660bpfh_SharesExcludedDueToExercisePriceExceedingAveragePriceDuringPeriod 951bpfh_SharesExcludedDueToExercisePriceExceedingAveragePriceDuringPeriod
Outstanding Stock Awards [Member]    
Shares Excluded Due to Exercise Price Exceeding Average Price During Period [Line Items]    
Shares Excluded Due to Exercise Price Exceeding Average Price During Period 660bpfh_SharesExcludedDueToExercisePriceExceedingAveragePriceDuringPeriod
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockCompensationPlanMember		 951bpfh_SharesExcludedDueToExercisePriceExceedingAveragePriceDuringPeriod
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockCompensationPlanMember