Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Level 1
Financial assets:
Cash and cash equivalents	$ 42,707	$ 138,396
Investment securities	149	133
Loans and loans held-for-sale, net	0	0
Accrued interest receivable	0	0
Federal Home Loan Bank stock	0	0
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	0	0
Time deposits	0	0
Borrowed funds	0	0
Accrued interest payable	0	0
Level 1 | Forward Sales Commitments
Financial assets:
Derivative assets		0
Financial liabilities:
Derivative liabilities	0
Level 1 | Interest Rate Swap Agreements
Financial assets:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities	0	0
Level 1 | Interest Rate Lock Commitments
Financial assets:
Derivative assets	0
Financial liabilities:
Derivative liabilities		0
Level 2
Financial assets:
Cash and cash equivalents	0	0
Investment securities	380,697	342,987
Loans and loans held-for-sale, net	0	0
Accrued interest receivable	2,041	1,760
Federal Home Loan Bank stock	3,474	4,154
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	887,866	898,372
Time deposits	654,776	742,552
Borrowed funds	113,508	105,926
Accrued interest payable	1,239	1,629
Level 2 | Forward Sales Commitments
Financial assets:
Derivative assets		0
Level 2 | Interest Rate Swap Agreements
Financial assets:
Derivative assets	0	0
Financial liabilities:
Derivative liabilities	0	0
Level 2 | Interest Rate Lock Commitments
Financial assets:
Derivative assets	0
Financial liabilities:
Derivative liabilities		481
Level 3
Financial assets:
Cash and cash equivalents	0	0
Investment securities	0	0
Loans and loans held-for-sale, net	1,177,642	1,187,663
Accrued interest receivable	4,461	4,616
Federal Home Loan Bank stock	0	0
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	0	0
Time deposits	0	0
Borrowed funds	0	0
Accrued interest payable	0	0
Level 3 | Forward Sales Commitments
Financial assets:
Derivative assets		873
Level 3 | Interest Rate Swap Agreements
Financial assets:
Derivative assets	180	196
Financial liabilities:
Derivative liabilities	180	196
Level 3 | Interest Rate Lock Commitments
Financial assets:
Derivative assets	807
Financial liabilities:
Derivative liabilities	0	0
Carrying Amount
Financial assets:
Cash and cash equivalents	42,707	138,396
Investment securities	380,846	343,120
Loans and loans held-for-sale, net	1,298,233	1,312,034
Accrued interest receivable	6,502	6,376
Federal Home Loan Bank stock	3,474	4,154
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	913,912	898,372
Time deposits	647,747	733,290
Borrowed funds	99,160	105,136
Accrued interest payable	1,239	1,629
Carrying Amount | Forward Sales Commitments
Financial assets:
Derivative assets		873
Carrying Amount | Interest Rate Swap Agreements
Financial assets:
Derivative assets	180	196
Financial liabilities:
Derivative liabilities	180	196
Carrying Amount | Interest Rate Lock Commitments
Financial assets:
Derivative assets	807
Financial liabilities:
Derivative liabilities	425	481
Estimated Fair Value
Financial assets:
Cash and cash equivalents	42,707	138,396
Investment securities	380,846	343,120
Loans and loans held-for-sale, net	1,177,642	1,187,663
Accrued interest receivable	6,502	6,376
Federal Home Loan Bank stock	3,474	4,154
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	887,866	898,372
Time deposits	654,776	742,552
Borrowed funds	113,508	105,926
Accrued interest payable	1,239	1,629
Estimated Fair Value | Forward Sales Commitments
Financial assets:
Derivative assets		873
Estimated Fair Value | Interest Rate Swap Agreements
Financial assets:
Derivative assets	180	196
Financial liabilities:
Derivative liabilities	180	196
Estimated Fair Value | Interest Rate Lock Commitments
Financial assets:
Derivative assets	807
Financial liabilities:
Derivative liabilities	$ 425	$ 481