Inventory And Land Held For Sale Inventory and Land Held for Sale (Land-related Charges) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Land impairments	$ 1,074	$ 7,347	$ 3,911
Net realizable value adjustments (NRV) - land held for sale	1,105	(901)	1,158
Write-off of deposits and pre-acquisition costs	17,157	5,021	6,099
Total land-related charges	$ 19,336	$ 11,467	$ 11,168