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Commitments And Contingencies (Narrative) (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 17, 2018 USD ($) transaction | Dec. 31, 2018 USD ($) claim | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) claim | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Insurance Settlements Receivable |  | $ 152,987 |  | $ 213,407 |  |  |  | $ 152,987 | $ 213,407 |  |
Write-off of insurance receivables |  |  |  | 9,300 | $ 5,300 |  | $ 15,000 |  |  |  |
Operating lease rent expense |  |  |  |  |  |  |  | 33,600 | 30,800 | $ 33,000 |
Letters of credit outstanding, amount |  | 239,400 |  | 235,500 |  |  |  | 239,400 | 235,500 |  |
Surety Bonds Outstanding |  | $ 1,300,000 |  | 1,200,000 |  |  |  | $ 1,300,000 | 1,200,000 |  |
Charges related to contractual dispute |  |  |  |  |  |  |  |  |  | 15,000 |
Maximum product warranty in years |  |  |  |  |  |  |  | 10 years |  |  |
Loss Contingency, Pending Claims, Number | claim |  | 1,000 |  |  |  |  |  | 1,000 |  |  |
Self-insurance liabilities |  | $ 737,013 |  | 758,812 |  |  |  | $ 737,013 | 758,812 | 831,058 | $ 924,563
Incurred but not reported percentage of liability reserves |  | 65.00% |  |  |  |  |  | 65.00% |  |  |
Adjustment to self insurance reserves |  |  | $ 37,900 | $ (75,300) |  | $ (19,800) |  | $ (35,873) | (97,789) | (57,132) |
Reserves provided |  | $ 16,200 |  |  |  |  |  | $ 16,130 | (50) | $ 506 |
Florida [Member] |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product Warranty Expense |  |  |  |  |  |  |  |  | $ 12,400 |  |
CTX Mortgage Company LLC [Member] | Lehman Complaint [Member] |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Damages sought, value | $ 261,000 |  |  |  |  |  |  |  |  |  |
RMBS Transactions - Alleged Violations [Member] | CTX Mortgage Company LLC [Member] | Lehman Complaint [Member] |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Number Of Transactions | transaction | 2 |  |  |  |  |  |  |  |  |  |
RMBS Transactions - Similar Indemnity Provisions [Member] | CTX Mortgage Company LLC [Member] | Lehman Complaint [Member] |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |
Loss Contingency, Number Of Transactions | transaction | 6 |  |  |  |  |  |  |  |  |  |

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