Investment Securities (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Investments [Line Items]
Amortized Cost: Due in one year or less	$ 19,524
Amortized Cost: Due after one year through five years	44,629
Amortized Cost: Due after five years through ten years	29,145
Amortized Cost: Due after ten years	58,654
Amortized Cost, Single Maturity Date, Total	151,952
Fair Value: Due in one year or less	19,524
Fair Value: Due after one year through five years	44,766
Fair Value: Due after five years through ten years	29,808
Fair Value: Due after ten years	47,082
Fair Value: Single Maturity Date, Total	141,180
Available for sale debt maturiites fair value sub total	221,117
Available For Sale Debt Maturities Amortized Cost Total	231,745
Available-for-sale Securities, Amortized Cost Basis	231,745	368,319
Available-for-sale Securities	221,117us-gaap_AvailableForSaleSecurities	336,589us-gaap_AvailableForSaleSecurities
Amortized Cost: Due after five years through ten years, Held to maturity	15,474
Amortized Cost: Due after ten years, Held to maturity	11,771
Amortized Cost: Total, Held to maturity	27,245
Fair Value: Due after five years through ten years, Held to maturity	15,775
Fair Value: Due after ten years, Held to maturity	11,867
Fair Value: Total, Held to maturity	27,642
Held-to-maturity Securities	109,449us-gaap_HeldToMaturitySecurities	3,900us-gaap_HeldToMaturitySecurities
Held-to-maturity Securities, Fair Value	110,771	3,590
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost: without Single Maturity Date	45,175
Fair Value: without Single Maturity Date	45,273
Available-for-sale Securities, Amortized Cost Basis	45,175	116,933
Available-for-sale Securities	45,273	112,444
Held-to-maturity Securities	58,400
Held-to-maturity Securities, Fair Value	59,008
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost: without Single Maturity Date	26,007
Fair Value: without Single Maturity Date	25,957
Available-for-sale Securities, Amortized Cost Basis	26,007	31,025
Available-for-sale Securities	25,957	29,905
Held-to-maturity Securities	16,425
Held-to-maturity Securities, Fair Value	16,737
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost: without Single Maturity Date	8,611
Fair Value: without Single Maturity Date	8,707
Available-for-sale Securities, Amortized Cost Basis	8,611	30,468
Available-for-sale Securities	8,707	29,390
Held-to-maturity Securities	7,379
Held-to-maturity Securities, Fair Value	$ 7,384

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