Commitments and Contingencies (Changes in Self-insurance Liability) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
Changes in Self-insurance Liability [Roll Forward] | ||||
Balance, beginning of period | $ 707,306 | $ 700,133 | $ 692,053 | $ 710,245 |
Reserves provided, net | 20,234 | 14,021 | 65,302 | 20,467 |
Payments | (24,993) | (11,670) | (54,808) | (28,228) |
Balance, end of period | $ 702,547 | $ 702,484 | $ 702,547 | $ 702,484 |