Fair Value of Financial Instruments (Fair value hierarchy) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Fair Value | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value $ 23,230 $ 32,535
Fair Value | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 290,054 218,824
Other liabilities - derivatives 385 635
Unexercised warrants 899  
Total liabilities measured at fair value 1,284 635
Quoted prices in active markets for identical assets (Level 1) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Quoted prices in active markets for identical assets (Level 1) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Other liabilities - derivatives 0 0
Unexercised warrants 0  
Total liabilities measured at fair value 0 0
Other observable inputs (Level 2) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Other observable inputs (Level 2) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 276,967 204,265
Other liabilities - derivatives 0 0
Unexercised warrants 0  
Total liabilities measured at fair value 0 0
Significant unobservable inputs (Level 3) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 23,230 32,535
Significant unobservable inputs (Level 3) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 13,087 14,559
Other liabilities - derivatives 385 635
Unexercised warrants 899  
Total liabilities measured at fair value 1,284 635
State and municipal securities | Fair Value | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 53,917 37,135
State and municipal securities | Quoted prices in active markets for identical assets (Level 1) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
State and municipal securities | Other observable inputs (Level 2) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 53,917 37,135
State and municipal securities | Significant unobservable inputs (Level 3) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Residential Mortgage Backed Securities | Fair Value | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 236,394 181,904
Residential Mortgage Backed Securities | Quoted prices in active markets for identical assets (Level 1) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Residential Mortgage Backed Securities | Other observable inputs (Level 2) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 223,050 167,130
Residential Mortgage Backed Securities | Significant unobservable inputs (Level 3) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 13,344 14,774
Derivative | Fair Value | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value (257) (215)
Derivative | Quoted prices in active markets for identical assets (Level 1) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Derivative | Other observable inputs (Level 2) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
Derivative | Significant unobservable inputs (Level 3) | Recurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value (257) (215)
Loans | Fair Value | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 17,594 [1] 25,885 [1]
Loans | Quoted prices in active markets for identical assets (Level 1) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 [1] 0 [1]
Loans | Other observable inputs (Level 2) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 [1] 0 [1]
Loans | Significant unobservable inputs (Level 3) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 17,594 [1] 25,885 [1]
OREO | Fair Value | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 5,636 6,650
OREO | Quoted prices in active markets for identical assets (Level 1) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
OREO | Other observable inputs (Level 2) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value 0 0
OREO | Significant unobservable inputs (Level 3) | Nonrecurring
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets measured at fair value $ 5,636 $ 6,650
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