Fair Value Disclosures Fair Value Disclosures (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Disclosed at fair value:
Senior notes	$ 1,925,487us-gaap_DebtInstrumentFairValue	$ 1,952,774us-gaap_DebtInstrumentFairValue
Level 2
Disclosed at fair value:
Financial Services debt	67,563	140,241
Level 1
Disclosed at fair value:
Cash and equivalents (including restricted cash)	1,068,261	1,309,220
Fair Value, Measurements, Nonrecurring \| Level 3
Measured at fair value on a non-recurring basis:
Assets, Fair Value Disclosure, Nonrecurring	0	13,925
Interest rate lock commitments \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure, Recurring	6,532	4,248
Forward contracts \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Liabilities, Fair Value Disclosure, Recurring	(2,149)	(3,574)
Whole loan commitments \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Liabilities, Fair Value Disclosure, Recurring	(122)	(588)
Residential Mortgage \| Fair Value, Measurements, Recurring \| Level 2
Measured at fair value on a recurring basis:
Assets, Fair Value Disclosure, Recurring	$ 226,292	$ 339,531

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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 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.

+ References

No definition available.

+ Details

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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.

+ References

No definition available.

+ Details

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- Definition

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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- Definition

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=35750535&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=35750535&loc=d3e13476-108611

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Line-of-Credit Arrangement

-URI http://asc.fasb.org/extlink&oid=6517033

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