Fair Value Disclosures (Details) - USD ($) $ in Thousands		Mar. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fixed-rate mortgage loans	[1]	$ 387,019	$ 163,341
Variable-rate mortgage loans		16,548	16,613
Construction loans	[1]	162,928	120,719
Exchangeable Senior Notes		97,588	97,419
Other Debt		6,888	2,827
Fair Value, Inputs, Level 1 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fixed-rate mortgage loans		0	0
Variable-rate mortgage loans		0	0
Construction loans		0	0
Exchangeable Senior Notes		0	0
Other Debt		0	0
Fair Value, Inputs, Level 2 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fixed-rate mortgage loans		372,771	164,808
Variable-rate mortgage loans		16,417	16,467
Construction loans		162,011	119,952
Exchangeable Senior Notes		102,030	101,793
Other Debt		7,024	3,014
Fair Value, Inputs, Level 3 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fixed-rate mortgage loans		0	0
Variable-rate mortgage loans		0	0
Construction loans		0	0
Exchangeable Senior Notes		0	0
Other Debt		$ 0	$ 0

[1] As stated in Note 6, on January 30, 2015, the Company and certain of its affiliates completed the acquisition of substantially all of the Sellers’ remaining interests in most of the Copper Beech properties. This acquisition represents $220.5 million of the increase in the fixed-rate mortgage loans, $37.9 million of the increase in the construction loans and $4.5 million of the increase in other debt related to Copper Beech letters of credit.