Investment in Unconsolidated Joint Ventures (Wildwood Associates) (Details)		12 Months Ended
		Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) a	Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items]
Proceeds from Equity Method Investment, Dividends or Distributions		$ 8,760,000	$ 10,296,000	$ 67,101,000
Equity Method Investments Including those with Negative Balances		79,434,000	77,461,000
Company's Investment		$ 102,577,000	$ 100,498,000
Wildwood Associates [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage of Partner in Joint Venture		5000.00%	5000.00%
Acres of land available for development or sale (acres) | a			27
Proceeds from Equity Method Investment, Dividends or Distributions		$ 2,100,000
Recognition of Deferred Revenue		582,000
Equity Method Investments Including those with Negative Balances	[1]	$ (1,122,000)	$ (1,106,000)

[1] Negative balances are included in deferred income on the consolidated balance sheets.