Fair Value Measurements (Details 5) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Assets
Fair Value at December 31, 2012	$ 11
Amount Due Upon Maturity	1,130
Difference	1,119
Loan securities carried at fair value [Member]
Assets
Fair Value at December 31, 2012	11
Amount Due Upon Maturity	1,130
Difference	$ 1,119