Amount of investment in financing receivables (after modification) modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Loans and Allowance For Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 Loan	Dec. 31, 2011 Loan	Dec. 31, 2010
Troubled debt restructurings
Number of Contracts	5	5
Post-Modification Outstanding Recorded Investment	$ 2,972		$ 3,099