Investments in Unconsolidated Joint Ventures Valuation (Details) (USD $)	12 Months Ended	3 Months Ended	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 United Kingdom [Member]	Dec. 31, 2012 United Kingdom [Member]
Investment Holdings, Other than Securities [Line Items]
Other than Temporary Impairment Losses, Investments	$ 0	$ 0	$ 683,000	$ 683,000

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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+ Details