Investment Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Rating:
Year of Vintage 2006	$ 7,994
Total Fair Value	7,994
Total Amortized Cost	9,147
CMOs [Member]
Rating:
Year of Vintage 2006
Total Fair Value
Total Amortized Cost
Total OTTI Related To Credit Loss
CCC and Below [Member]
Rating:
Year of Vintage 2006	7,994
Total Fair Value	7,994
Total Amortized Cost	9,147
Total OTTI Related To Credit Loss	$ 1,052