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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Letters of credit outstanding | $ 245,700 |  | $ 245,700 |  |  | $ 191,300 |  |
Surety bonds outstanding | 1,100,000 |  | 1,100,000 |  |  | 1,000,000 |  |
Litigation settlement expense | 15,000 | $ 20,000 | $ 15,000 | $ 20,000 |  |  |  |
Maximum product warranty in years |  |  | 10 years |  |  |  |  |
Self-insurance liabilities | $ 702,547 | 702,484 | $ 702,547 | 702,484 | $ 707,306 | $ 692,053 | $ 700,133 | $ 710,245
Incurred but not reported percentage of liability reserves | 64.00% |  | 64.00% |  |  | 65.00% |  |
Gain (loss) related to litigation settlement |  | $ 5,700 |  | $ 32,600 |  |  |  |
litigation of recorded insurance receivable |  |  | $ 108,100 |  |  |  |  |
Other Assets |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Recorded insurance receivables | $ 136,900 |  | $ 136,900 |  |  | $ 130,200 |  |

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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