Commitments and Contingencies (Changes in Self-insurance Liability) (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
---|---|---|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
Changes in Self-insurance Liability [Roll Forward] | ||
Balance, beginning of period | $ 710,245 | $ 668,100 |
Reserves provided | 15,832 | 14,855 |
Payments | (5,310) | (18,544) |
Balance, end of period | $ 720,767 | $ 664,411 |