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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Financial assets:    
Fair Value, Available for Sale $ 398,190 $ 356,311
Trust preferred securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 15,960 15,068
Other debt securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 21,280 22,930
Other equity securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 3,741 3,068
Obligations of other U.S. Government agencies and corporations [Member]
    
Financial assets:    
Fair Value, Available for Sale 6,120 2,442
Government agency mortgage backed securities [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 171,902 144,817
Government agency mortgage backed securities [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 42,753 45,058
Government agency collateralized mortgage obligations [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 131,356 117,521
Government agency collateralized mortgage obligations [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 5,078 5,407
Recurring [Member]
    
Financial assets:    
Fair Value, Available for Sale 398,190 356,311
Derivative instruments 6,509 4,654
Total financial assets 454,967 395,810
Financial liabilities:    
Derivative instruments 2,664 5,514
Total financial liabilities 2,664 5,514
Recurring [Member] | Interest rate contracts [Member]
    
Financial assets:    
Derivative instruments 1,824 3,083
Financial liabilities:    
Derivative instruments 1,826 3,152
Recurring [Member] | Interest rate lock commitments [Member]
    
Financial assets:    
Derivative instruments 76 1,571
Financial liabilities:    
Derivative instruments 606  
Recurring [Member] | Interest rate swaps [Member]
    
Financial assets:    
Derivative instruments 10  
Financial liabilities:    
Derivative instruments 232 2,164
Recurring [Member] | Forward commitments [Member]
    
Financial assets:    
Derivative instruments 4,599  
Financial liabilities:    
Derivative instruments 0 198
Recurring [Member] | Mortgage loans held for sale [Member]
    
Financial assets:    
Derivative instruments 50,268 34,845
Recurring [Member] | Trust preferred securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 15,960 15,068
Recurring [Member] | Other debt securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 21,280 22,930
Recurring [Member] | Other equity securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 3,741 3,068
Recurring [Member] | Obligations of other U.S. Government agencies and corporations [Member]
    
Financial assets:    
Fair Value, Available for Sale 6,120 2,442
Recurring [Member] | Government agency mortgage backed securities [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 171,902 144,817
Recurring [Member] | Government agency mortgage backed securities [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 42,753 45,058
Recurring [Member] | Government agency collateralized mortgage obligations [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 131,356 117,521
Recurring [Member] | Government agency collateralized mortgage obligations [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 5,078 5,407
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Derivative instruments 0 0
Total financial assets 0 0
Financial liabilities:    
Derivative instruments 0 0
Total financial liabilities 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Interest rate contracts [Member]
    
Financial assets:    
Derivative instruments 0 0
Financial liabilities:    
Derivative instruments 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Interest rate lock commitments [Member]
    
Financial assets:    
Derivative instruments 0 0
Financial liabilities:    
Derivative instruments 0  
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Interest rate swaps [Member]
    
Financial assets:    
Derivative instruments 0  
Financial liabilities:    
Derivative instruments 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Forward commitments [Member]
    
Financial assets:    
Derivative instruments 0  
Financial liabilities:    
Derivative instruments 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Mortgage loans held for sale [Member]
    
Financial assets:    
Derivative instruments 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Trust preferred securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Other debt securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Other equity securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Obligations of other U.S. Government agencies and corporations [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Government agency mortgage backed securities [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Government agency mortgage backed securities [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Government agency collateralized mortgage obligations [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Government agency collateralized mortgage obligations [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
    
Financial assets:    
Fair Value, Available for Sale 382,230 341,243
Derivative instruments 6,509 4,654
Total financial assets 439,007 380,742
Financial liabilities:    
Derivative instruments 2,664 5,514
Total financial liabilities 2,664 5,514
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest rate contracts [Member]
    
Financial assets:    
Derivative instruments 1,824 3,083
Financial liabilities:    
Derivative instruments 1,826 3,152
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest rate lock commitments [Member]
    
Financial assets:    
Derivative instruments 76 1,571
Financial liabilities:    
Derivative instruments 606  
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Interest rate swaps [Member]
    
Financial assets:    
Derivative instruments 10  
Financial liabilities:    
Derivative instruments 232 2,164
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Forward commitments [Member]
    
Financial assets:    
Derivative instruments 4,599  
Financial liabilities:    
Derivative instruments 0 198
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Mortgage loans held for sale [Member]
    
Financial assets:    
Derivative instruments 50,268 34,845
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Trust preferred securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other debt securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 21,280 22,930
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other equity securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 3,741 3,068
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Obligations of other U.S. Government agencies and corporations [Member]
    
Financial assets:    
Fair Value, Available for Sale 6,120 2,442
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Government agency mortgage backed securities [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 171,902 144,817
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Government agency mortgage backed securities [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 42,753 45,058
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Government agency collateralized mortgage obligations [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 131,356 117,521
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Government agency collateralized mortgage obligations [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 5,078 5,407
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
    
Financial assets:    
Fair Value, Available for Sale 15,960 15,068
Derivative instruments 0 0
Total financial assets 15,960 15,068
Financial liabilities:    
Derivative instruments 0 0
Total financial liabilities 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Interest rate contracts [Member]
    
Financial assets:    
Derivative instruments 0 0
Financial liabilities:    
Derivative instruments 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Interest rate lock commitments [Member]
    
Financial assets:    
Derivative instruments 0 0
Financial liabilities:    
Derivative instruments 0  
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Interest rate swaps [Member]
    
Financial assets:    
Derivative instruments 0  
Financial liabilities:    
Derivative instruments 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Forward commitments [Member]
    
Financial assets:    
Derivative instruments 0  
Financial liabilities:    
Derivative instruments 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Mortgage loans held for sale [Member]
    
Financial assets:    
Derivative instruments 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Trust preferred securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 15,960 15,068
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other debt securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other equity securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Obligations of other U.S. Government agencies and corporations [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Government agency mortgage backed securities [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Government agency mortgage backed securities [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Government agency collateralized mortgage obligations [Member] | Residential mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale 0 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Government agency collateralized mortgage obligations [Member] | Commercial mortgage backed securities [Member]
    
Financial assets:    
Fair Value, Available for Sale $ 0 $ 0