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Commitments And Contingencies (Changes in Self-insurance Liability) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Litigation of Recorded Insurance Receivable |  |  | $ 113,600 |  |
Adjustment to self insurance reserves | $ (55,200) | $ (29,600) | (55,200) | $ (62,200) | $ 69,300
Insurance Related Expenses [Roll Forward] |  |  |  |  |
Balance, beginning of period |  |  | 924,563 | 995,692 |
Reserves provided |  |  | 40,784 | 16,085 |
Payments |  |  | (134,289) | (87,214) |
Balance, end of period | $ 831,058 | $ 924,563 | $ 831,058 | $ 924,563 | $ 995,692

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- Definition Additions to self insurance reserves during the period + References No definition available. + Details
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- Definition Adjustment to self insurance reserves + References No definition available. + Details
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- Definition Changes in Self-insurance Liability [Roll Forward] + References No definition available. + Details
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- Definition Litigation of Recorded Insurance Receivable + References No definition available. + Details
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- Definition Amount, after effects of reinsurance, of payments to settle insured claims and pay costs incurred in the claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 + 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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