Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Available for sale:
Total investment securities available for sale, Amortized cost	$ 85,146	$ 17,864
Total investment securities available for sale, Gross unrealized gains	155	38
Total investment securities available for sale, Gross unrealized losses	3	57
Total investment securities available for sale, estimated fair value	85,298	17,845
Held to maturity:
Securities held-to-maturity, at cost	903	3,083
Total investment securities held to maturity, gross unrealized gains	54	52
Total investment securities held to maturity, gross unrealized losses	0	0
Total investment securities held to maturity, estimated fair value	957	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	903	1,075
Total investment securities held to maturity, gross unrealized gains	54	52
Total investment securities held to maturity, gross unrealized losses	0	0
Total investment securities held to maturity, estimated fair value	957	1,127
U.S. government sponsored enterprises [Member]
Available for sale:
Total investment securities available for sale, Amortized cost	83,956	16,289
Total investment securities available for sale, Gross unrealized gains	118	6
Total investment securities available for sale, Gross unrealized losses	3	3
Total investment securities available for sale, estimated fair value	84,071	16,292
Corporate equity securities [Member]
Available for sale:
Total investment securities available for sale, Amortized cost	44	106
Total investment securities available for sale, Gross unrealized gains	0	0
Total investment securities available for sale, Gross unrealized losses	0	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	1,146	1,469
Total investment securities available for sale, Gross unrealized gains	37	32
Total investment securities available for sale, Gross unrealized losses	0	0
Total investment securities available for sale, estimated fair value	1,183	1,501
Held to maturity:
Securities held-to-maturity, at cost	903
Total investment securities held to maturity, estimated fair value	$ 957

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

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