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Quarterly results (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,518,445 |  | $ 1,255,327 |  | $ 1,033,154 |  | $ 852,184 |  | $ 1,230,971 |  | $ 1,114,027 |  | $ 904,831 |  | $ 783,767 |  | $ 4,659,110 | [1] | $ 4,033,596 | [1] | $ 4,447,627 |
Cost of revenues | 1,261,012 |  | 1,044,765 |  | 876,990 |  | 745,563 |  | 1,079,370 |  | 944,882 |  | 793,465 |  | 685,960 |  | 3,928,331 | [1] | 3,503,677 | [1] | 4,059,940 |
Income (loss) before income taxes | 75,225 | [2] | 79,179 | [2] | 23,939 | [2] | (20,352) | [2] | 18,351 | [3] | (211,126) | [3] | (36,690) | [3] | (46,365) | [3] | 157,991 | [1],[2] | (275,830) | [1],[3] | (1,240,155) |
Financial Services: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | 48,521 |  | 47,264 |  | 36,251 |  | 28,852 |  | 31,374 |  | 27,904 |  | 22,381 |  | 21,435 |  | 160,888 | [1] | 103,094 | [1] | 121,663 |
Income (loss) before income taxes | (24,012) | [4] | 26,727 | [4] | 15,987 | [4] | 6,861 | [4] | (27,426) | [5] | 8,626 | [5] | (16,643) | [5] | 973 | [5] | 25,563 | [1],[4],[6] | (34,470) | [1],[5],[6] | 5,609 | [6]
Consolidated results: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues | 1,566,966 |  | 1,302,591 |  | 1,069,405 |  | 881,036 |  | 1,262,345 |  | 1,141,931 |  | 927,212 |  | 805,202 |  | 4,819,998 | [1] | 4,136,690 | [1] | 4,569,290 |
Income (loss) before income taxes | 51,213 |  | 105,906 |  | 39,926 |  | (13,491) |  | (9,075) |  | (202,500) |  | (53,333) |  | (45,392) |  | 183,554 | [1] | (310,300) | [1] | (1,234,546) |
Income taxes (benefit) | (7,529) |  | (10,727) |  | (2,510) |  | (1,825) |  | (22,896) |  | (73,202) |  | 2,052 |  | (5,866) |  | (22,591) | [1] | (99,912) | [1] | (137,817) |
Net income (loss) | $ 58,742 |  | $ 116,633 |  | $ 42,436 |  | $ (11,666) |  | $ 13,821 |  | $ (129,298) |  | $ (55,385) |  | $ (39,526) |  | $ 206,145 | [1] | $ (210,388) | [1] | $ (1,096,729) |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic | $ 0.15 |  | $ 0.31 |  | $ 0.11 |  | $ (0.03) |  | $ 0.04 |  | $ (0.34) |  | $ (0.15) |  | $ (0.10) |  | $ 0.54 | [1] | $ (0.55) | [1] | $ (2.90) |
Diluted | $ 0.15 |  | $ 0.30 |  | $ 0.11 |  | $ (0.03) |  | $ 0.04 |  | $ (0.34) |  | $ (0.15) |  | $ (0.10) |  | $ 0.54 | [1] | $ (0.55) | [1] | $ (2.90) |
Number of shares used in calculation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic | 383,404 |  | 381,355 |  | 380,655 |  | 380,502 |  | 380,149 |  | 380,025 |  | 379,781 |  | 379,544 |  | 381,562 | [1] | 379,877 | [1] | 378,585 |
Effect of dilutive securities | 5,900 |  | 3,215 |  | 1,548 |  | 0 |  | 1,112 |  | 0 |  | 0 |  | 0 |  | 3,002 | [1] | 0 | [1] | 0 |
Diluted | 389,304 |  | 384,570 |  | 382,203 |  | 380,502 |  | 381,261 |  | 380,025 |  | 379,781 |  | 379,544 |  | 384,564 | [1] | 379,877 | [1] | 378,585 |
[1] | Due to rounding, the sum of quarterly results may not equal the total for the year. Additionally, quarterly and year-to-date computations of per share amounts are made independently.
[2] | includes losses on debt retirements totaling $32.1 million in the 4th Quarter.
[3] | Homebuilding income (loss) before income taxes includes land-related charges of $0.7 million, $6.8 million, $3.9 million, and $24.4 million in the 1st Quarter, 2nd Quarter, 3rd Quarter, and 4th Quarter, respectively; goodwill impairment charges totaling $240.5 million in the 3rd Quarter; and losses on debt retirements of $3.5 million and $2.1 million in the 2nd Quarter and 4th Quarter, respectively.
[4] | loss) before income taxes includes additional loan origination reserves of $49.0 million in the 4th Quarter.
[5] | Financial Services income (loss) before income taxes includes additional loan origination reserves of $19.3 million and $40.0 million in the 2nd Quarter and 4th Quarter, respectively.
[6] | Financial Services income (loss) before income taxes includes interest expense of $0.5 million, $0.0 million, and $1.6 million for 2012, 2011, and 2010, respectively, and interest income of $6.0 million, $5.0 million, and $5.8 million for 2012, 2011, and 2010, respectively.

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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