Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Level 1
Financial assets:
Cash and cash equivalents	$ 123,222	$ 92,918
Investment securities	1,112	1,084
Loans and loans held-for-sale, net	0	0
Accrued interest receivable	0	0
Federal Home Loan Bank stock	4,155	6,130
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	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 liabilities:
Derivative liabilities		0
Level 2
Financial assets:
Cash and cash equivalents	0	0
Investment securities	309,444	329,338
Loans and loans held-for-sale, net	0	0
Accrued interest receivable	6,229	6,745
Federal Home Loan Bank stock	0	0
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	858,491	855,455
Time deposits	800,977	885,903
Borrowed funds	103,270	106,923
Accrued interest payable	1,746	2,619
Level 2 | Forward Sales Commitments
Financial assets:
Derivative assets	1,008	57
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		0
Level 3
Financial assets:
Cash and cash equivalents	0	0
Investment securities	0	0
Loans and loans held-for-sale, net	1,228,930	1,365,586
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 3 | Forward Sales Commitments
Financial assets:
Derivative assets	0	0
Level 3 | Interest Rate Swap Agreements
Financial assets:
Derivative assets	213	216
Financial liabilities:
Derivative liabilities	213	216
Level 3 | Interest Rate Lock Commitments
Financial liabilities:
Derivative liabilities	491	130
Carrying Amount
Financial assets:
Cash and cash equivalents	123,222	92,918
Investment securities	310,556	330,422
Loans and loans held-for-sale, net	1,356,403	1,437,610
Accrued interest receivable	6,229	6,745
Federal Home Loan Bank stock	4,155	6,130
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	862,622	855,455
Time deposits	788,838	875,886
Borrowed funds	102,299	105,539
Accrued interest payable	1,746	2,619
Carrying Amount | Forward Sales Commitments
Financial assets:
Derivative assets	1,008	57
Carrying Amount | Interest Rate Swap Agreements
Financial assets:
Derivative assets	213	216
Financial liabilities:
Derivative liabilities	213	216
Carrying Amount | Interest Rate Lock Commitments
Financial liabilities:
Derivative liabilities	491	130
Estimated Fair Value
Financial assets:
Cash and cash equivalents	123,222	92,918
Investment securities	310,556	330,422
Loans and loans held-for-sale, net	1,228,930	1,365,586
Accrued interest receivable	6,229	6,745
Federal Home Loan Bank stock	4,155	6,130
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	858,491	855,455
Time deposits	800,977	885,903
Borrowed funds	103,270	106,923
Accrued interest payable	1,746	2,619
Estimated Fair Value | Forward Sales Commitments
Financial assets:
Derivative assets	1,008	57
Estimated Fair Value | Interest Rate Swap Agreements
Financial assets:
Derivative assets	213	216
Financial liabilities:
Derivative liabilities	213	216
Estimated Fair Value | Interest Rate Lock Commitments
Financial liabilities:
Derivative liabilities	$ 491	$ 130