Investment in Unconsolidated Subsidiaries (Schedule of Unaudited Selected Financial Information) (Details) - WJH [Member] $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($)
Homebuilding revenues	$ 271,653
Income before income tax expense	$ 26,185

The amount of gross profit (loss) reported by an equity method investment of the entity.

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