Fair Value Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Disclosed at fair value:
Senior notes	$ 3,206,575	$ 3,112,297
Level 2
Disclosed at fair value:
Financial Services debt	140,381	331,621
Level 1
Disclosed at fair value:
Cash and equivalents (including restricted cash)	423,863	723,248
Fair Value, Measurements, Nonrecurring \| Level 3
Measured at fair value on a non-recurring basis:
Assets, Fair Value Disclosure, Nonrecurring	0	8,920
Interest rate lock commitments \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure, Recurring	12,456	8,693
Forward contracts \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure, Recurring		7,081
Liabilities, Fair Value Disclosure, Recurring	(2,969)
Whole loan commitments \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure, Recurring		272
Liabilities, Fair Value Disclosure, Recurring	(232)
Residential Mortgage \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure, Recurring	$ 345,379	$ 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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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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

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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=73719730&loc=d3e13433-108611

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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 portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Line-of-Credit Arrangement
-URI http://asc.fasb.org/extlink&oid=6517033

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