Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Level 1
Financial assets:
Cash and cash equivalents	$ 101,587	$ 92,918
Investment securities	1,133	1,084
Loans and loans held-for-sale, net	0	0
Accrued interest receivable	0	0
Federal Home Loan Bank stock	4,630	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
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	338,339	329,338
Loans and loans held-for-sale, net	0	0
Accrued interest receivable	6,512	6,745
Federal Home Loan Bank stock	0	0
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	857,242	855,455
Time deposits	828,463	885,903
Borrowed funds	100,421	106,923
Accrued interest payable	2,821	2,619
Level 2 | Forward Sales Commitments
Financial assets:
Derivative assets		57
Financial liabilities:
Derivative liabilities	102
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	1,305,845	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
Financial liabilities:
Derivative liabilities	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 assets:
Derivative assets	577
Financial liabilities:
Derivative liabilities		130
Carrying Amount
Financial assets:
Cash and cash equivalents	101,587	92,918
Investment securities	339,472	330,422
Loans and loans held-for-sale, net	1,368,451	1,437,610
Accrued interest receivable	6,512	6,745
Federal Home Loan Bank stock	4,630	6,130
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	857,242	855,455
Time deposits	816,121	875,886
Borrowed funds	99,310	105,539
Accrued interest payable	2,821	2,619
Carrying Amount | Forward Sales Commitments
Financial assets:
Derivative assets		57
Financial liabilities:
Derivative liabilities	102
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 assets:
Derivative assets	577
Financial liabilities:
Derivative liabilities		130
Estimated Fair Value
Financial assets:
Cash and cash equivalents	101,587	92,918
Investment securities	339,472	330,422
Loans and loans held-for-sale, net	1,305,845	1,365,586
Accrued interest receivable	6,512	6,745
Federal Home Loan Bank stock	4,630	6,130
Financial liabilities:
Demand deposits, NOW, savings and money market accounts	857,242	855,455
Time deposits	828,463	885,903
Borrowed funds	100,421	106,923
Accrued interest payable	2,821	2,619
Estimated Fair Value | Forward Sales Commitments
Financial assets:
Derivative assets		57
Financial liabilities:
Derivative liabilities	102
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 assets:
Derivative assets	577
Financial liabilities:
Derivative liabilities		$ 130