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Acquisitions - Remeasurement Gain (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended	3 Months Ended	0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 17, 2013 Camelback Colonnade	Sep. 30, 2013 Camelback Colonnade	Oct. 24, 2013 Superstition Springs Land I	Oct. 24, 2013 Superstition Springs Land I	Sep. 16, 2013 Camelback Colonnade
Acquisition
Fair value of existing ownership interest (at % ownership)			$ 41,690		$ 47,340
Carrying value of investment	(927,424)	(701,483)	(5,349)			(32,476)
Remeasurement gain			$ 36,341	$ 36,341	$ 14,864
Ownership interest before acquisition (as a percent)						66.70%	73.20%

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- Definition

Fair value at acquisition-date of the equity interest in the acquiree held by the acquirer, immediately before the acquisition date for businesses combined in stages.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

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- Definition

Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

+ References

No definition available.

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- Definition

In a business combination achieved in stages, this element represents the amount of net gain (loss) recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination.

+ References

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

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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

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