Consolidated Statements of Operations (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Parent Company [Member]
Interest income	$ 350	$ 379	$ 1,101	$ 1,291
Unrealized Gain on Securities	(875)	(618)	(1,724)	(1,343)
Partnership Interest [Member]
Interest income	350	379	1,101	1,291
Unrealized Gain on Securities	$ (875)	$ (618)	$ (1,724)	$ (1,343)

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration