Basis of Presentation and Significant Accounting Policies - Narrative (Details)	3 Months Ended
	Mar. 31, 2016 segment
Significant Accounting Policies [Line Items]
Number of reportable segments	6
Minimum
Significant Accounting Policies [Line Items]
Percentage of sales price from construction management agreements	3.00%
Maximum
Significant Accounting Policies [Line Items]
Percentage of sales price from construction management agreements	5.00%