Fair Value of Financial Instruments (Fair value by balance sheet grouping) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Carrying Amount | Significant unobservable inputs (Level 3)
Financial assets:
Loans receivable, net	$ 520,768	$ 502,252
Financial liabilities
Deposit liabilities	748,934	729,373
Borrowings	97,265	130,631
Unexercised warrants	828	0
Carrying Amount | Other observable inputs (Level 2)
Financial assets:
Held-to-maturity securities	14,826	16,143
Loans held for sale	1,684	5,561
Accrued interest receivable	4,320	4,100
Other assets	2,024	2,095
Financial liabilities
Accrued interest payable	1,185	1,676
Other liabilities	328	635
Carrying Amount | Quoted prices in active markets for identical assets (Level 1)
Financial assets:
Cash, cash equivalents, restricted cash and federal funds sold	80,085	109,868
BOLI	9,472	9,127
Carrying Amount | Other observable inputs and Significant unobservable inputs (Level 2 and 3)
Financial assets:
Available-for-sale securities	280,169	219,039
Fair Value | Significant unobservable inputs (Level 3)
Financial assets:
Loans receivable, net	536,003	515,737
Financial liabilities
Deposit liabilities	751,755	709,534
Borrowings	94,673	131,202
Unexercised warrants	828	0
Fair Value | Other observable inputs (Level 2)
Financial assets:
Held-to-maturity securities	16,344	17,471
Loans held for sale	1,684	5,561
Accrued interest receivable	4,320	4,100
Other assets	2,024	2,095
Financial liabilities
Accrued interest payable	1,185	1,676
Other liabilities	328	635
Fair Value | Quoted prices in active markets for identical assets (Level 1)
Financial assets:
Cash, cash equivalents, restricted cash and federal funds sold	80,085	109,868
BOLI	9,472	9,127
Fair Value | Other observable inputs and Significant unobservable inputs (Level 2 and 3)
Financial assets:
Available-for-sale securities	$ 280,169	$ 219,039