Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
REVENUES
Real estate sales and other	$ 21,961us-gaap_SalesOfRealEstate	$ 55,547us-gaap_SalesOfRealEstate
Commercial and income producing properties	10,869	9,933
Real estate	32,830us-gaap_RealEstateRevenueNet	65,480us-gaap_RealEstateRevenueNet
Oil and gas	13,185us-gaap_OilAndGasRevenue	17,554us-gaap_OilAndGasRevenue
Other natural resources	1,790us-gaap_OtherSalesRevenueNet	1,571us-gaap_OtherSalesRevenueNet
Total revenues	47,805us-gaap_SalesRevenueNet	84,605us-gaap_SalesRevenueNet
COSTS AND EXPENSES
Cost of real estate sales and other	(10,362)us-gaap_CostOfRealEstateSales	(26,064)us-gaap_CostOfRealEstateSales
Cost of commercial and income producing properties	(7,692)	(10,120)
Cost of oil and gas producing activities	(11,542)us-gaap_OilAndGasProductionExpense	(12,620)us-gaap_OilAndGasProductionExpense
Cost of other natural resources	(920)us-gaap_OtherCostOfOperatingRevenue	(776)us-gaap_OtherCostOfOperatingRevenue
Other operating	(18,060)us-gaap_OtherCostAndExpenseOperating	(13,997)us-gaap_OtherCostAndExpenseOperating
General and administrative	(8,142)us-gaap_GeneralAndAdministrativeExpense	(5,145)us-gaap_GeneralAndAdministrativeExpense
Total expenses	(56,718)us-gaap_CostsAndExpenses	(68,722)us-gaap_CostsAndExpenses
Gain on asset exchange and sales	1,176us-gaap_GainLossOnDispositionOfAssets1	0us-gaap_GainLossOnDispositionOfAssets1
OPERATING INCOME (LOSS)	(7,737)us-gaap_OperatingIncomeLoss	15,883us-gaap_OperatingIncomeLoss
Equity in earnings of unconsolidated ventures	3,045	991
Interest expense	(8,821)us-gaap_InterestExpense	(5,503)us-gaap_InterestExpense
Other non-operating income	917us-gaap_OtherNonoperatingIncome	2,294us-gaap_OtherNonoperatingIncome
INCOME (LOSS) BEFORE TAXES	(12,596)	13,665
Income tax benefit (expense)	4,359us-gaap_IncomeTaxExpenseBenefit	(4,658)us-gaap_IncomeTaxExpenseBenefit
CONSOLIDATED NET INCOME (LOSS)	(8,237)us-gaap_ProfitLoss	9,007us-gaap_ProfitLoss
Less: Net (income) loss attributable to noncontrolling interests	79	(673)
NET INCOME (LOSS) ATTRIBUTABLE TO FORESTAR GROUP INC.	(8,158)us-gaap_NetIncomeLoss	8,334us-gaap_NetIncomeLoss
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)	34,168	35,576
Diluted (in shares)	34,168	43,913
NET INCOME PER COMMON SHARE
Basic (usd per share)	$ (0.24)us-gaap_EarningsPerShareBasic	$ 0.20us-gaap_EarningsPerShareBasic
Diluted (usd per share)	$ (0.24)us-gaap_EarningsPerShareDiluted	$ 0.19us-gaap_EarningsPerShareDiluted
TOTAL COMPREHENSIVE INCOME (LOSS)	$ (8,158)us-gaap_ComprehensiveIncomeNetOfTax	$ 8,334us-gaap_ComprehensiveIncomeNetOfTax

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Reflects for the period the total of the carrying amount of the commercial, industrial and residential land and buildings sold plus certain overhead and other costs incurred to place the real estate in saleable condition, capitalized interest costs in the properties sold, and inventory impairment losses recognized. This element would most likely be used by an entity whose principal activities involve real estate or which has significant real estate operations.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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