Debt (Details Textual) (USD $)			9 Months Ended
Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Debenture [Member]	Aug. 31, 2012 Debenture [Member]
Short-term Debt [Line Items]
SBIC subsidiaries issued debenture	$ 100,547,000	$ 95,870,000		$ 2,000,000
SBIC debenture interest rate				2.245%
Annual fees			0.515%
Debenture maturity period			10 years
Debt (Textual) [Abstract]
Face amount of debt	$ 100,547,000	$ 95,870,000		$ 2,000,000
Repayment of structured note date	Feb. 15, 2012

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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