Fair Value Disclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Disclosed at fair value:
Financial Services debt	$ 83,000
Revolving credit facility	83,000	$ 0
Level 2
Disclosed at fair value:
Financial Services debt	245,824	331,621
Revolving credit facility	83,000	0
Senior notes	3,356,459	3,112,297
Level 1
Disclosed at fair value:
Cash and equivalents (including restricted cash)	197,097	723,248
Land held for sale \| Fair Value, Measurements, Nonrecurring \| Level 2
Measured at fair value on a non-recurring basis:
Fair value	0	1,670
House and land inventory \| Fair Value, Measurements, Nonrecurring \| Level 3
Measured at fair value on a non-recurring basis:
Fair value	0	8,920
Interest rate lock commitments \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Fair value	10,034	8,693
Forward contracts \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Fair value	517	7,081
Whole loan commitments \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Fair value		272
Fair value	(589)
Residential Mortgage \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Fair value	$ 364,734	$ 539,496

Fair Value, Assets and Liabilities Measured on Non-Recurring Basis [Abstract]

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Fair Value Disclosure [Abstract]

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611

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Aggregation of the liabilities reported on the balance sheet measured at fair value on a recurring basis by the entity.

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Fair value of the amount outstanding under the credit facility.

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