Significant Accounting Policies (Schedule of Real Estate Inventory Capitalized Interest Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real Estate Inventory, Capitalized Interest Costs [Roll Forward]
Interest capitalized at beginning of year	$ 9,085	$ 3,713	$ 1,065
Interest incurred	3,218	9,625	4,146
Interest charged to cost of sales	(2,886)	(3,972)	(105)
Interest charged to interest expense	0	(281)	(1,393)
Interest capitalized at end of year	$ 9,417	$ 9,085	$ 3,713