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Other Assets and Other Liabilities (Schedule of Other Liabilities) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) property	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Real Estate Properties [Line Items]
Other liabilities	$ 81,526		$ 81,526		$ 75,993
Accrued expenses	84,174		84,174		72,693
Accrued interest payable	56,716		56,716		54,033
Intangible liabilities, net	7,843		7,843		8,851
Accounts payable, accrued expenses and other liabilities	230,259		230,259		211,570
Developer fee payable	24,000		24,000		24,000
Special assessment bond	7,300		7,300		8,500
Below market lease, accumulated amortization	7,500		7,500		6,400
Amortization of below market lease	800	$ 300	1,000	$ 600
Real Estate Available and Held for Sale
Real Estate Properties [Line Items]
Accrued expenses	2,500		$ 2,500		1,700
Residential Real Estate | Master Planned Community
Real Estate Properties [Line Items]
Number of properties | property			2
Real Estate Assets Held-for-Sale
Real Estate Properties [Line Items]
Other liabilities	$ 1,500		$ 1,500		$ 1,200

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include property accounts payable, legal liabilities, loan costs, general and administrative liabilities, but exclude interest.

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(1),(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project.

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