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Commitments and Contingencies (Narrative) (Details) (USD $) | 3 Months Ended | 6 Months Ended | 24 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2007 | Mar. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |  |  |  |
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% |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss Contingency, Range of Possible Loss, Maximum | 40,000,000 | 40,000,000 |  |  |  |  |  |
Letters of Credit Outstanding, Amount | 171,600,000 | 171,600,000 |  |  | 179,200,000 |  |  |
Surety Bonds Outstanding | 1,000,000,000 | 1,000,000,000 |  |  | 1,000,000,000 |  |  |
Litigation Settlement, Expense | 30,000,000 | 30,000,000 |  |  |  |  |  |
Maximum product warranty in years |  | 10 years |  |  |  |  |  |
Number of self-insurance claims managed at any one time | 1,000 | 1,000 |  |  |  |  |  |
Self-insurance liabilities | 708,142,000 | 708,142,000 |  | 717,024,000 | 721,284,000 | 733,042,000 | 736,130,000 | 739,029,000
Incurred but not reported percentage of liability reserves | 75.00% | 75.00% |  |  |  |  |  |
Residential mortgage backed securities known [Member] |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Residential mortgage-backed securities principal sold in previous period | 162,000,000 | 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 | $ 116,000,000 |  |  |  |  |  |

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- Definition Principal amount of mortgage loans Company sold in a residential mortgage backed securities transaction that is currently associated with a lawsuit in which the bank the Company sold the loans to has been named a defendant. + References No definition available. + Details
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