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Investment Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Held-To-Maturity    
Fair Value, 12 months or longer $ 0  
Available-for-Sale    
Fair Value, Less than 12 months 166,257 233,909
Gross Unrealized Holding Losses, Less Than 12 Months 1,461 1,206
Fair Value, 12 months or longer     
Gross Unrealized Holding Losses, 12 Months or Longer 0   
Fair Value 166,257 233,909
Gross Unrealized Holding Losses 1,461 1,206
CMO [Member]
   
Held-To-Maturity    
Fair Value, Less than 12 months 2,191 2,383
Gross Unrealized Holding Losses, Less than 12 months 0  
Fair Value, 12 months or longer 0   
Gross unrealized holding losses, 12 months or longer 0   
Fair Value 2,191 2,383
Gross Unrealized Holding Losses 0  
Government Agency [Member]
   
Held-To-Maturity    
Fair Value, 12 months or longer 0  
Available-for-Sale    
Fair Value, Less than 12 months 2,957  
Gross Unrealized Holding Losses, Less Than 12 Months 0  
Fair Value, 12 months or longer     
Gross Unrealized Holding Losses, 12 Months or Longer 0   
Fair Value 2,957  
Gross Unrealized Holding Losses 0  
Residential Mortgage-backed securities[Member]
   
Held-To-Maturity    
Fair Value, 12 months or longer 0  
Available-for-Sale    
Fair Value, Less than 12 months 33 75,754
Gross Unrealized Holding Losses, Less Than 12 Months 0 334
Fair Value, 12 months or longer     
Gross Unrealized Holding Losses, 12 Months or Longer 0   
Fair Value 33 75,754
Gross Unrealized Holding Losses 0 334
CMO's / REMIC's - Residential [Member]
   
Held-To-Maturity    
Fair Value, 12 months or longer 0  
Available-for-Sale    
Fair Value, Less than 12 months 144,220 133,471
Gross Unrealized Holding Losses, Less Than 12 Months 1,043 665
Fair Value, 12 months or longer     
Gross Unrealized Holding Losses, 12 Months or Longer 0   
Fair Value 144,220 133,471
Gross Unrealized Holding Losses 1,043 665
Municipal Bonds [Member]
   
Held-To-Maturity    
Fair Value, 12 months or longer 0  
Available-for-Sale    
Fair Value, Less than 12 months 19,047 22,184
Gross Unrealized Holding Losses, Less Than 12 Months 418 203
Fair Value, 12 months or longer     
Gross Unrealized Holding Losses, 12 Months or Longer 0   
Fair Value 19,047 22,184
Gross Unrealized Holding Losses 418 203
Other Securities [Member]
   
Held-To-Maturity    
Fair Value, 12 months or longer 0  
Available-for-Sale    
Fair Value, Less than 12 months 0 2,500
Gross Unrealized Holding Losses, Less Than 12 Months 0 4
Fair Value, 12 months or longer     
Gross Unrealized Holding Losses, 12 Months or Longer 0   
Fair Value 0 2,500
Gross Unrealized Holding Losses $ 0 $ 4