Commitments and Contingencies - Insurance (Details) - USD ($) $ in Thousands |
Dec. 31, 2018 |
Dec. 31, 2017 |
---|---|---|
Commitment And Contingencies [Line Items] | ||
Insurance and other non-current liabilities | $ 404,560 | $ 342,356 |
Insurance Claims | ||
Commitment And Contingencies [Line Items] | ||
Gross amount accrued for insurance claims | 272,900 | 254,700 |
Insurance and other non-current liabilities | 210,100 | 200,000 |
Related insurance recoveries/receivables | 56,500 | 50,400 |
Related insurance recoveries/receivables included in prepaid expenses and other current assets | 300 | 400 |
Related insurance recoveries/receivables included in other assets net | 56,200 | $ 50,000 |
Atlantic Bridge Project Insurance Claim | ||
Commitment And Contingencies [Line Items] | ||
Related insurance recoveries/receivables | $ 26,700 |