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Notes Payable (Details Textual) - USD ($) |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 01, 2016 | Jan. 15, 2016 | Aug. 01, 2015 | Jun. 30, 2016 | Sep. 30, 2015
Debt Instrument [Line Items] |  |  |  |  |
Outstanding letters of credit |  |  |  | $ 96,100,000 |
Homebuilding [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized repurchase of debt securities |  |  | $ 500,000,000 |  |
Debt repurchase program, remaining authorized repurchase amount |  |  |  | $ 500,000,000 |
Homebuilding [Member] | 5.625% senior notes due 2016 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate |  |  |  | 5.625% |
Homebuilding [Member] | 6.5% senior notes due 2016 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Stated interest rate |  |  |  | 6.50% |
Financial Services [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing capacity on revolving credit facility |  |  |  | $ 475,000,000 |
Maximum borrowing capacity on revolving credit facility |  |  |  | 650,000,000 |
Line of credit facility additional borrowing capacity |  |  |  | 600,000,000 |
Mortgage loans held for sale pledged under repurchase agreement |  |  |  | 589,200,000 |
Mortgage loans, collateral value |  |  |  | 569,300,000 |
Advance pay downs on mortgage repurchase facility |  |  |  | 65,100,000 |
Mortgage repurchase obligation outstanding |  |  |  | $ 504,200,000 | $ 477,900,000
Interest rate on mortgage repurchase facility |  |  |  | 2.60% |
Unsecured Debt [Member] | Homebuilding [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt issuance costs |  |  |  | $ 14,300,000 | 17,300,000
Unsecured Debt [Member] | Homebuilding [Member] | 5.625% senior notes due 2016 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Remaining unpaid principal amount |  | $ 170,200,000 |  |  |
Stated interest rate |  |  |  | 5.625% |
Unsecured Debt [Member] | Homebuilding [Member] | 6.5% senior notes due 2016 [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Remaining unpaid principal amount |  |  |  | $ 372,700,000 |
Stated interest rate |  |  |  | 6.50% |
Line of Credit [Member] | Homebuilding [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing capacity on revolving credit facility |  |  |  | $ 975,000,000 |
Maximum borrowing capacity on revolving credit facility |  |  |  | $ 1,250,000,000 |
Letters of credit, sublimit borrowing capacity, as a percentage |  |  |  | 50.00% |
Borrowings outstanding |  |  |  | $ 0 | $ 0
Outstanding letters of credit |  |  |  | 93,200,000 |
Subsequent Event [Member] | Homebuilding [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Authorized repurchase of debt securities | $ 500,000,000 |  |  |  |
Maximum [Member] | Financial Services [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Borrowing capacity on revolving credit facility |  |  |  | $ 550,000,000 |

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- Definition The total repurchase amount authorized by an entity's Board of Directors under a debt repurchase plan. + References No definition available. + Details
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- Definition The remaining repurchase amount authorized by an entity's Board of Directors under a debt repurchase plan. + References No definition available. + Details
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- Definition The accordion feature of a line of credit agreement which can be used to increase the capacity of the facility, subject to certain conditions and availability of bank commitments. + References No definition available. + Details
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- Definition Interest rate on the amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(m)(1)(i)(A)(ii)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition The cash outflow for the settlement of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, as it matures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The carrying amount, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of repurchase obligations, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=64858031&loc=SL6224234-111729 + Details
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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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