Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2016 |
Sep. 30, 2017 |
Sep. 30, 2016 |
Jun. 30, 2017 |
Dec. 31, 2016 |
Jun. 30, 2016 |
Dec. 31, 2015 |
|
Loss Contingencies [Line Items] | ||||||||
Letters of credit outstanding | $ 244,700 | $ 244,700 | $ 219,100 | |||||
Surety bonds outstanding | 1,200,000 | $ 1,200,000 | 1,100,000 | |||||
Litigation Settlement, Expense | $ 15,000 | $ 15,000 | ||||||
Maximum product warranty in years | 10 years | |||||||
Self-insurance liabilities | $ 824,625 | $ 931,950 | $ 824,625 | $ 931,950 | $ 814,756 | 831,058 | $ 936,711 | $ 924,563 |
Incurred but not reported percentage of liability reserves | 69.00% | 69.00% | ||||||
Write-off of insurance receivables | 5326 | 20326 | ||||||
litigation of recorded insurance receivable | $ 77,500 | |||||||
Other Assets | ||||||||
Loss Contingencies [Line Items] | ||||||||
Recorded insurance receivables | $ 261,100 | $ 261,100 | $ 307,300 |