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Subsequent Event (Notes)	12 Months Ended
	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENT On October 5, 2017, the Company acquired 75% of the outstanding shares of Forestar for $558.3 million in cash, pursuant to the terms of the merger agreement entered into in June 2017. Forestar is and will continue to be a publicly-traded residential and real estate development company with operations currently in 14 markets and 10 states, where it owns, directly or through joint ventures, interests in 44 residential and mixed-use projects. The Company’s alignment with Forestar advances its strategy of increasing its access to high-quality optioned land and lot positions to enhance operational efficiency and returns. Both companies are identifying land development opportunities to expand Forestar’s platform, and the Company plans to acquire a large portion of Forestar’s finished lots in accordance with the master supply agreement between the two companies. As the controlling shareholder of Forestar, the Company will have significant influence in guiding the strategic direction and driving the operational execution necessary to increase the future value potential of Forestar. The Company has hired a valuation firm to assist in the allocation of the purchase price to the assets acquired and liabilities assumed. As of the date of issuance of the financial statements the purchase price allocation had not been completed. The Company anticipates the purchase price will be allocated primarily to the tangible assets acquired and liabilities assumed of Forestar, but does anticipate some intangible assets arising from the transaction.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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