Basis of Presentation and Significant Accounting Policies - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016 USD ($) Property	Sep. 30, 2016 USD ($) Property segment
Significant Accounting Policies [Line Items]
Number of parcels of land sold | Property	2	5
Gain (loss) on sale of land | $	$ 2.7	$ 2.7
Number of reportable segments | segment		6
Minimum
Significant Accounting Policies [Line Items]
Percentage of sales price fee from construction management agreements		3.00%
Maximum
Significant Accounting Policies [Line Items]
Percentage of sales price fee from construction management agreements		5.00%