Disclosures Regarding Fair Value (Details Textual) (USD $) In Thousands, unless otherwise specified					6 Months Ended
Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Nonrecurring [Member]	Dec. 31, 2011 Nonrecurring [Member]	Jun. 30, 2012 Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Measured liabilities	$ 1,091,188	$ 1,099,670	$ 0	$ 0
Impaired loans period					12 months

Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19-26)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_Liabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant