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Investment Securities (Details) (USD $)
In Thousands, unless otherwise specified |
6 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Dec. 31, 2011
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Jun. 30, 2012
U.S. Treasury Securities and Obligations of U.S. Government Corporations & Agencies [Member]
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Dec. 31, 2011
U.S. Treasury Securities and Obligations of U.S. Government Corporations & Agencies [Member]
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Jun. 30, 2012
Obligations of States and Political Subdivisions [Member]
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Dec. 31, 2011
Obligations of States and Political Subdivisions [Member]
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Jun. 30, 2012
Mortgage-backed Securities: GSE Residential [Member]
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Dec. 31, 2011
Mortgage-backed Securities: GSE Residential [Member]
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Jun. 30, 2012
Trust Preferred Securities [Member]
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Dec. 31, 2011
Trust Preferred Securities [Member]
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Jun. 30, 2012
Trust Preferred Securities [Member]
Minimum [Member]
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Jun. 30, 2012
Trust Preferred Securities [Member]
Maximum [Member]
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Dec. 31, 2011
Trust Preferred Securities [Member]
Maximum [Member]
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Jun. 30, 2012
Other Securities [Member]
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Dec. 31, 2011
Other Securities [Member]
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| Available-for-sale: [Abstract] | ||||||||||||||||
| Amortized Cost-AFS | $ 150,936 | $ 164,812 | $ 46,176 | $ 38,828 | $ 291,720 | $ 254,930 | $ 5,372 | $ 5,625 | $ 9,612 | $ 9,561 | ||||||
| Gross Unrealized Gains | 11,260 | 10,608 | 1,166 | 1,294 | 2,841 | 2,374 | 7,206 | 6,940 | 7 | 0 | 40 | 0 | ||||
| Gross Unrealized Losses | 5,049 | 5,448 | 52 | 40 | 26 | 0 | 91 | 37 | 4,731 | 4,906 | 149 | 465 | ||||
| Fair Value | 510,027 | 478,916 | 152,050 | 166,066 | 48,991 | 41,202 | 298,835 | 261,833 | 648 | 719 | 9,503 | 9,096 | ||||
| Held-to-maturity Securities [Abstract] | ||||||||||||||||
| Amortized Cost | 51 | 51 | ||||||||||||||
| Unrealized Gains | 0 | 0 | ||||||||||||||
| Unrealized Losses | 0 | 0 | ||||||||||||||
| Fair Value | 51 | 51 | ||||||||||||||
| Number of trust preferred securities | 4 | 3 | 4 | |||||||||||||
| Maturities of Debt Securities | 18 years | 26 years | ||||||||||||||
| Realized Investment Gains (Losses) [Abstract] | ||||||||||||||||
| Gross gains | 823 | 377 | ||||||||||||||
| Gross losses | $ 0 | $ 0 | ||||||||||||||