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Commitments And Contingencies (Narrative) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) claim | Dec. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) claim | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Pending Claims, Number | claim | 1,000 |  | 1,000 |  |
Loss Contingency Accrual, Period Increase (Decrease) |  |  |  | $ (32,600) |
Adjustment to self insurance reserves | $ (55,200) | $ (29,600) | $ (55,200) | (62,200) | $ 69,300
Increase (Decrease) in Self Insurance Reserve |  |  |  | (29,600) |
Operating lease rent expense |  |  | 33,000 | 27,700 | 25,300
Accrued liabilities for outstanding community development district obligations | 8,875 | 11,964 | 8,875 | 11,964 |
Letters of credit outstanding, amount | 219,100 | 191,300 | 219,100 | 191,300 |
Surety Bonds Outstanding | 1,100,000 | 1,000,000 | 1,100,000 | 1,000,000 |
Charges related to contractual dispute |  |  | $ 15,000 | 20,000 |
Maximum product warranty in years |  |  | 10 years |  |
Self-insurance liabilities | $ 831,058 | $ 924,563 | $ 831,058 | $ 924,563 | $ 995,692
Incurred but not reported percentage of liability reserves | 70.00% | 74.00% | 70.00% | 74.00% |

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project. + 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(19)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: 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(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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