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Commitments And Contingencies (Narrative) (Details) (USD $) | 3 Months Ended | 12 Months Ended | 24 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2007 | Dec. 31, 2008
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Total Mortgage Loans Originated |  |  |  |  |  |  |  | $ 39,500,000,000 |
Percentage of loan origination repurchase requests in which Company is able to cure or refute the claim |  |  |  |  | 60.00% |  |  |  |
Actual Loss Severities Percentage on Mortgage Repurchase Requests |  |  |  |  | 50.00% |  |  |  |
Loan origination liabilities assumed in business combination |  |  |  |  | 0 | 0 | 56,293,000 |  |
Reserves for potential claims under mortgage reinsurance programs | 7,600,000 |  |  |  | 2,800,000 | 7,600,000 |  |  |
Accrued liabilities for outstanding community development district obligations | 73,334,000 |  |  |  | 38,440,000 | 73,334,000 |  |  |
Aggregate Principal Balance of Community Development District Obligations Repurchased |  |  |  |  | 26,600,000 | 124,100,000 |  |  |
Discount on repurchases of community development district obligations |  |  |  |  | 5,200,000 | 12,900,000 |  |  |
Letters of Credit Outstanding, Amount | 388,900,000 |  |  |  | 235,900,000 | 388,900,000 |  |  |
Surety Bonds Outstanding | 1,300,000,000 |  |  |  | 1,200,000,000 | 1,300,000,000 |  |  |
Maximum product warranty in years |  |  |  |  | 10 |  |  |  |
Self-insurance liabilities | 785,562,000 |  |  |  | 741,383,000 | 785,562,000 | 551,020,000 |  | 323,227,000
Incurred but not reported percentage of liability reserves | 78.00% |  |  |  | 78.00% | 78.00% |  |  |
Adjustment to self insurance reserves | (11,400,000) | 272,200,000 | 9,600,000 | 10,000,000 |  | 280,400,000 |  |  |
Adjustment to insurance reserve per basic and diluted share |  |  |  |  |  | $ 0.74 |  |  |
Liabilities assumed with merger |  |  |  |  | 0 | 2,514,000 | 271,071,000 |  |
Residential mortgage backed securities known [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities principal sold in previous period |  |  |  |  | 162,000,000 |  |  |  |
Residential mortgage backed securities other [Member] |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities principal sold in previous period |  |  |  |  | $ 116,000,000 |  |  |  |

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