Long-Term Incentive Plan (Cash Flow Effects Of LTIP Settlements) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||
| Partners' Capital Account, Units, Unit-based Compensation (in shares) | 168,913 | 216,679 | 350,552 |
| Settlement of tax withholdings on long-term incentive compensation | $ 9,285 | $ 13,875 | $ 14,376 |
| Payments for Other Taxes | 1,100 | 1,200 | 1,400 |
| Total Cash Taxes Paid (in millions) | $ 10,400 | $ 15,100 | $ 15,800 |