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Investment Securities (Gross realize gains and losses by category) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]  
Sale Price $ 163,235
Book Value 158,869
Available-for-sale Securities, Gross Realized Gains 4,366
Available-for-sale Securities, Gross Realized Losses 0
Collateralized Mortgage Backed Securities [Member] | FNMA and FHLMC [Member]
 
Schedule of Available-for-sale Securities [Line Items]  
Sale Price 115,158
Book Value 110,792
Available-for-sale Securities, Gross Realized Gains 4,366
Available-for-sale Securities, Gross Realized Losses 0
Collateralized Mortgage Backed Securities [Member] | GNMA [Member]
 
Schedule of Available-for-sale Securities [Line Items]  
Sale Price 48,077
Book Value 48,077
Available-for-sale Securities, Gross Realized Gains 0
Available-for-sale Securities, Gross Realized Losses $ 0