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Summary of Significant Accounting Policies: (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Y segment location	Dec. 31, 2010	Dec. 31, 2009
Variable interest entities included in the consolidated financial statements
Redemption of noncontrolling interests	$ (42)	$ (193)	$ (397)
Income Taxes:
Minimum percentage of taxable income distribution to stockholders to qualify as REIT	90.00%
Period for which entity could be disqualified as REIT (in years)	4
Segment Information:
Number of business segments	1
Number of geographic areas in which the Company operates	1
Concentration of Risk:
Maximum guarantee provided by Federal Deposit Insurance Corporation on cash held in banks	$ 250

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Represents the maximum deposit in a single account guaranteed by the Federal Deposit Insurance Corporation for cash held in commercial banks.

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Represents the minimum percentage of taxable income that must be distributed to stockholders for the entity to qualify as a REIT.

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+ References

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

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.



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=6959260&loc=d3e187085-122770



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569655-111683



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 24

-URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4616395-111683

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The number of countries in which the entity operates as of balance sheet date.

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