Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Available for sale:
Total investment securities available for sale, amortized cost	$ 79,499	$ 17,864
Total investment securities available for sale, gross unrealized gains	271	38
Total investment securities available for sale, gross unrealized losses	61	57
Total investment securities available for sale, estimated fair value	79,709	17,845
Held to maturity:
Securities held to maturity, at cost	939	3,083
Total investment securities held to maturity, gross unrealized gains	58	52
Total investment securities held to maturity, gross unrealized losses	0	0
Total investment securities held to maturity, estimated fair value	997	3,135
Municipal Bonds [Member]
Held to maturity:
Securities held to maturity, at cost		2,008
Total investment securities held to maturity, gross unrealized gains		0
Total investment securities held to maturity, gross unrealized losses		0
Total investment securities held to maturity, estimated fair value		2,008
Mortgage-backed securities [Member]
Held to maturity:
Securities held to maturity, at cost	939	1,075
Total investment securities held to maturity, gross unrealized gains	58	52
Total investment securities held to maturity, gross unrealized losses	0	0
Total investment securities held to maturity, estimated fair value	997	1,127
Corporate bonds [Member]
Available for sale:
Total investment securities available for sale, amortized cost	4,211
Total investment securities available for sale, gross unrealized gains	96
Total investment securities available for sale, gross unrealized losses	0
Total investment securities available for sale, estimated fair value	4,307
U.S. government sponsored enterprises [Member]
Available for sale:
Total investment securities available for sale, amortized cost	73,958	16,289
Total investment securities available for sale, gross unrealized gains	130	6
Total investment securities available for sale, gross unrealized losses	5	3
Total investment securities available for sale, estimated fair value	74,083	16,292
Corporate equity securities [Member]
Available for sale:
Total investment securities available for sale, amortized cost	100	106
Total investment securities available for sale, gross unrealized gains	0	0
Total investment securities available for sale, gross unrealized losses	56	54
Total investment securities available for sale, estimated fair value	44	52
Held to maturity:
Securities held to maturity, at cost	0
Total investment securities held to maturity, estimated fair value	0
Mortgage-backed securities [Member]
Available for sale:
Total investment securities available for sale, amortized cost	1,230	1,469
Total investment securities available for sale, gross unrealized gains	45	32
Total investment securities available for sale, gross unrealized losses	0	0
Total investment securities available for sale, estimated fair value	1,275	1,501
Held to maturity:
Securities held to maturity, at cost	939
Total investment securities held to maturity, estimated fair value	$ 997

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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