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10. Borrowed Funds (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Debt Disclosure [Abstract]      
Long-term borrowings $ 163,565 $ 203,268 $ 253,635
Average interest rate paid on long-term borrowings 3.86%   3.95%
Subordinated debentures 16,800 16,800 16,800
Subordinated debentures owed to unconsolidated subsidiary trusts $ 19,589 $ 19,589 $ 19,589