Discontinued Operations and Assets and Liabilities Held-for-Sale - Narrative (Details) $ / shares in Units, $ in Thousands, shares in Millions		3 Months Ended
	Apr. 10, 2017 $ / shares shares	Mar. 31, 2017 USD ($)	Sep. 30, 2017	Feb. 28, 2017 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment		$ 7,148
Indemnification Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Escrow deposit				$ 6,000
Agribusiness | Discontinued Operations, Disposed of by Sale | Maximum | Indemnification Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Indemnification claims guaranteed in excess of escrow				$ 8,000
Merger Of UCP And Century Communities | Scenario, Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cost method, ownership percentage			9.00%
UCP | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Right to cash ($ per share) | $ / shares	$ 5.32
Merger stock exchange ratio	0.2309
Initial lockup period	60 days
Stock acquired (shares) | shares	1.3
Periodic lockup period	50 days
Lockup period	210 days