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DIVIDENDS (Details) - USD ($)													12 Months Ended
	Jan. 19, 2018	Oct. 20, 2017	Jul. 20, 2017	Apr. 24, 2017	Jan. 06, 2017	Oct. 20, 2016	Jul. 28, 2016	Apr. 21, 2016	Feb. 01, 2016	Oct. 22, 2015	Jul. 20, 2015	Apr. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Dividends
Preferred dividends declared													$ 55,113	$ 55,113	$ 55,414
Series I, Class B
Dividends
Preferred dividends declared	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 12,313	$ 37,891
Series II, Class B
Dividends
Preferred dividends declared	$ 42,800	$ 42,800	$ 42,800	$ 42,800	$ 42,800	$ 42,800	$ 42,800	$ 42,800	$ 43,101	$ 44,050	$ 44,050	$ 132,926

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Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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