OTHER INVESTMENTS - Summary of other investments (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Schedule of Investments [Line Items]
Investment Focus	$ 3,304,000	$ 3,604,000
Venture capital funds - technology and communications
Schedule of Investments [Line Items]
Investment Focus	473,000	514,000
Venture capital funds - diversified businesses
Schedule of Investments [Line Items]
Investment Focus	1,098,000	1,337,000
Real estate and related
Schedule of Investments [Line Items]
Investment Focus	1,409,000	1,453,000
Other
Schedule of Investments [Line Items]
Investment Focus	$ 325,000	$ 300,000

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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 210.5-02.12)

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594

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