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Security Types (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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US Government and Government Agencies and Authorities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | $ 0 | $ 0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 24,001 | 20,065
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 22,614 | 19,460
Available-for-sale Securities, Fair Value, Total | 46,615 | 39,525
Available-for-sale Securities, Gross Unrealized Gain | 22 | 187
Available-for-sale Securities, Gross Unrealized Losses | 2,480 | 19
Available-for-sale Securities, Amortized Cost Basis | 49,073 | 39,357
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 3,968 | 4,700
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 149,995 | 136,760
Available-for-sale Securities, Fair Value, Total | 153,963 | 141,460
Available-for-sale Securities, Gross Unrealized Gain | 938 | 3,012
Available-for-sale Securities, Gross Unrealized Losses | 3,416 | 162
Available-for-sale Securities, Amortized Cost Basis | 156,441 | 138,610
US States and Political Subdivisions Debt Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 0 | 111
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 1,846 | 1,830
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 20,149 | 21,006
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 47,527 | 54,891
Available-for-sale Securities, Fair Value, Total | 69,522 | 77,838
Available-for-sale Securities, Gross Unrealized Gain | 2,341 | 5,222
Available-for-sale Securities, Gross Unrealized Losses | 309 | 0
Available-for-sale Securities, Amortized Cost Basis | 67,490 | 72,616
Trust Preferred Securities Individual Issuer [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 0 | 0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 694 | 652
Available-for-sale Securities, Fair Value, Total | 694 | 652
Available-for-sale Securities, Gross Unrealized Gain | 137 | 113
Available-for-sale Securities, Gross Unrealized Losses | 136 | 154
Available-for-sale Securities, Amortized Cost Basis | 693 | 693
Security Maturities, Total [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value | 0 | 111
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value | 1,846 | 1,830
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value | 48,118 | 45,771
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value | 220,830 | 211,763
Available-for-sale Securities, Fair Value, Total | 270,794 | 259,475
Available-for-sale Securities, Gross Unrealized Gain | 3,438 | 8,534
Available-for-sale Securities, Gross Unrealized Losses | 6,341 | 335
Available-for-sale Securities, Amortized Cost Basis | $ 273,697 | $ 251,276

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