Revenue Recognition (Deposits Recognized as Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Total deposits recognized as revenue	$ 7,429	$ 3,432
Residential units \| Homebuyers
Disaggregation of Revenue [Line Items]
Total deposits recognized as revenue	6,604	3,201
Land and Lots [Member] \| Homebuilders
Disaggregation of Revenue [Line Items]
Total deposits recognized as revenue	$ 825	$ 231

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration