Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Carrying amount [Member]
Carrying amounts and fair values of financial instruments
Federal Reserve Bank, Federal Home Loan Bank and Other Stock	$ 2,376	$ 2,536
Carrying amount [Member] | Level 1 [Member]
Carrying amounts and fair values of financial instruments
Cash and due from banks	343,938	172,559
Carrying amount [Member] | Level 2 [Member]
Carrying amounts and fair values of financial instruments
Cash equivalents	1,150
Investment securities held to maturity	8,095	9,315
Loans Held for Sale	7,500
Loans, net of allowance	818,998	929,696
Accrued interest and loan fees receivable	5,256	6,885
Non Maturity Deposit	1,121,564	1,056,923
Time Deposits	260,202	254,949
Accrued interest payable	325	348
Carrying amount [Member] | Level 2 & Level 3 [Member]
Carrying amounts and fair values of financial instruments
Investment securities available for sale	307,719	299,204
Fair value [Member] | Level 1 [Member]
Carrying amounts and fair values of financial instruments
Cash and due from banks	343,938	172,559
Fair value [Member] | Level 2 [Member]
Carrying amounts and fair values of financial instruments
Cash equivalents	1,150
Investment securities held to maturity	8,920	10,161
Loans Held for Sale	7,500
Loans, net of allowance	847,550	960,070
Accrued interest and loan fees receivable	5,256	6,885
Non Maturity Deposit	1,121,564	1,056,923
Time Deposits	262,336	257,267
Accrued interest payable	325	348
Fair value [Member] | Level 2 & Level 3 [Member]
Carrying amounts and fair values of financial instruments
Investment securities available for sale	$ 307,719	$ 299,204