Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	$ 39,613	$ 34,250
Fair Value Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	34,079	28,856
Fair Value Loan Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	5,385	5,309
Interest Rate Cap [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	149	85
Fair Value Inputs Level1 [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	34,079	28,856
Fair Value Inputs Level1 [Member] | Fair Value Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	34,079	28,856
Fair Value Inputs Level1 [Member] | Fair Value Loan Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring
Fair Value Inputs Level1 [Member] | Interest Rate Cap [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring
Fair Value Inputs Level2 [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	149	85
Fair Value Inputs Level2 [Member] | Fair Value Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring
Fair Value Inputs Level2 [Member] | Fair Value Loan Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring
Fair Value Inputs Level2 [Member] | Interest Rate Cap [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	149	85
Fair Value Inputs Level 3 [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	5,385	5,309
Fair Value Inputs Level 3 [Member] | Fair Value Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring
Fair Value Inputs Level 3 [Member] | Fair Value Loan Securities [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring	5,385	5,309
Fair Value Inputs Level 3 [Member] | Interest Rate Cap [Member]
Assets measured at fair value on a recurring basis
Assets Fair Value Disclosure Recurring