Commitments and Contingencies (Narrative) (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | |||||
---|---|---|---|---|---|---|---|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2018
USD ($)
claim
|
Sep. 30, 2017
USD ($)
|
Jun. 30, 2018
USD ($)
|
Dec. 31, 2017
USD ($)
|
Jun. 30, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
|
|
Loss Contingencies [Line Items] | |||||||
Letters of credit outstanding | $ 219,600 | $ 235,500 | |||||
Surety bonds outstanding | $ 1,200,000 | 1,200,000 | |||||
Maximum product warranty in years | 10 years | ||||||
Number of individual claims managed | claim | 1,000 | ||||||
Self-insurance liabilities | $ 824,625 | $ 726,497 | $ 824,625 | $ 725,482 | $ 758,812 | $ 814,756 | $ 831,058 |
Incurred but not reported percentage of liability reserves | 62.00% | 65.00% | |||||
Adjustment to self insurance reserves | $ 37,900 | 19,800 | |||||
Write-off of insurance receivables | $ 5,300 | $ 20,300 | |||||
Litigation of recorded insurance receivable | 21,500 | ||||||
Other Assets | |||||||
Loss Contingencies [Line Items] | |||||||
Recorded insurance receivables | $ 151,200 | $ 213,400 |