The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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_DebtInstrumentUnamortizedPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Subsequent Event Narrative Tagging (Details) (USD $)	6 Months Ended			3 Months Ended
Subsequent Event Narrative Tagging (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Public housing capital fund trusts [Member] Integer	Jun. 30, 2012 LIFERS [Member]	Jun. 30, 2012 LIFERS [Member] Public housing capital fund trusts [Member]	Jun. 30, 2012 SPEARS [Member] Public housing capital fund trusts [Member]
Schedule of Available-for-sale Securities [Line Items]
TOB Financing	$ 9,900,000	$ 17,700,000			$ 16,000,000	$ 49,000,000
Number of Available for Sale Securities, Public Housing Authorities			3
Available for Sale Securities, not Including Premiums			65,264,703
Available-for-Sale Securities, Ownership Percentage	100.00%			100.00%
Debt Instrument, Unamortized Premium			$ 652,640