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Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015
Loss Contingencies [Line Items] |  |  |  |  |  |
Letters of credit outstanding | $ 234,000 |  | $ 219,100 |  |  |
Surety bonds outstanding | $ 1,200,000 |  | 1,100,000 |  |  |
Maximum product warranty in years | 10 years |  |  |  |  |
Self-insurance liabilities | $ 814,756 | $ 835,326 | 831,058 | $ 936,711 | $ 922,385 | $ 924,563
Incurred but not reported percentage of liability reserves | 70.00% |  |  |  |  |
Write-off of insurance receivables | 15000 |  |  |  |  |
litigation of recorded insurance receivable | $ 99,300 |  |  |  |  |
Other Assets |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Recorded insurance receivables | $ 261,800 |  | $ 307,300 |  |  |

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- Definition Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12053-110248 + Details
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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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