Derivatives (Details - narrative items)	6 Months Ended
Jun. 30, 2015
Maximum [Member]
Derivatives Fair Value [Line Items]
Credit derivative term	5 years
Minimum [Member]
Derivatives Fair Value [Line Items]
Credit derivative term	1 day

Term of the credit risk derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4K

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5708775-113959

Name:	us-gaap_CreditDerivativeTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration