Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 474,338us-gaap_NetIncomeLoss	$ 2,620,116us-gaap_NetIncomeLoss	$ 206,145us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash flows provided by (used in) operating activities:
Deferred income tax expense	223,769	(2,096,425)	0
Write-down of land and deposits and pre-acquisition costs	11,168us-gaap_AssetImpairmentCharges	9,672us-gaap_AssetImpairmentCharges	17,195us-gaap_AssetImpairmentCharges
Depreciation and amortization	39,864us-gaap_DepreciationAndAmortization	31,587us-gaap_DepreciationAndAmortization	30,027us-gaap_DepreciationAndAmortization
Stock-based compensation expense	29,292us-gaap_ShareBasedCompensation	30,480us-gaap_ShareBasedCompensation	22,897us-gaap_ShareBasedCompensation
Loss on debt retirements	8,584	26,930	32,071
Equity in earnings of unconsolidated entities	(8,408)	(1,130)	(4,059)
Distributions of earnings from unconsolidated entities	4,932	2,049	7,488
Other non-cash, net	9,567us-gaap_OtherNoncashIncomeExpense	9,375us-gaap_OtherNoncashIncomeExpense	10,356us-gaap_OtherNoncashIncomeExpense
Increase (decrease) in cash due to:
Restricted cash	1,368	3,387	1,257
Inventories	(346,596)us-gaap_IncreaseDecreaseInInventories	265,064us-gaap_IncreaseDecreaseInInventories	455,223us-gaap_IncreaseDecreaseInInventories
Residential mortgage loans available-for-sale	(53,734)	28,448	(60,828)
Other assets	(46,249)	(38,190)	26,014
Accounts payable, accrued and other liabilities	(23,671)	(17,377)	20,802
Income tax liabilities	(14,975)	7,150	(4,448)
Net cash provided by operating activities	309,249	881,136	760,140
Cash flows from investing activities:
Distributions from unconsolidated entities	8,157	1,001	3,029
Investments in unconsolidated entities	(9)	(1,677)	(16,456)
Net change in loans held for investment	335	(12,265)	836
Change in restricted cash related to letters of credit	54,989	(4,152)	28,653
Proceeds from the sale of property and equipment	113	15	7,586
Capital expenditures	(48,790)	(28,899)	(13,942)
Cash used for business acquisition	(82,419)	0	0
Net cash provided by (used in) investing activities	(67,624)	(45,977)	9,706
Cash flows from financing activities:
Financial Services borrowings (repayments)	34,577	(33,131)	138,795
Other borrowings (repayments)	(250,631)us-gaap_ProceedsFromRepaymentsOfDebt	(479,827)us-gaap_ProceedsFromRepaymentsOfDebt	(618,800)us-gaap_ProceedsFromRepaymentsOfDebt
Stock option exercises	15,627	19,411	32,809
Stock repurchases	(253,019)	(127,661)	(961)
Dividends paid	(75,646)us-gaap_PaymentsOfDividends	(38,382)us-gaap_PaymentsOfDividends	0us-gaap_PaymentsOfDividends
Net cash used in financing activities	(529,092)	(659,590)	(448,157)
Net increase (decrease) in cash and equivalents	(287,467)	175,569	321,689
Cash and equivalents at beginning of period	1,580,329	1,404,760	1,083,071
Cash and equivalents at end of period	1,292,862	1,580,329	1,404,760
Supplemental Cash Flow Information:
Interest paid (capitalized), net	(4,561)us-gaap_InterestPaidNet	(171)us-gaap_InterestPaidNet	(1,470)us-gaap_InterestPaidNet
Income taxes paid (refunded), net	$ 1,030us-gaap_IncomeTaxesPaidNet	$ 373us-gaap_IncomeTaxesPaidNet	$ (13,322)us-gaap_IncomeTaxesPaidNet

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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- Definition

Cash dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations that are returns of capital. Excludes dividends or distributions from equity method investments classified as operating activities.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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Period Type:	duration

- Definition

The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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Period Type:	duration

- Definition

The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-Subparagraph c

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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