Other Investments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013 Security	Dec. 31, 2012
Other Investments [Abstract]
Number of correspondent banks with stock ownership by Company	2
Number of government-sponsored agency mortgage-backed securities purchased by Company for CRA investment	3
Components of Other Investments [Abstract]
FRB - Atlanta	$ 3,789	$ 2,258
FHLB - Dallas	2,804	1,862
Other bank stocks	2,063	2,063
Other stocks	187	7
CRA investment	2,108	2,120
Total other investments	$ 10,951	$ 8,310	[1]

[1] Derived from audited financial statements.