Long-Term Incentive Plan (Narrative) (Details) - shares |
Feb. 01, 2019 |
Jun. 30, 2019 |
|---|---|---|
| Share-based Payment Arrangement [Abstract] | ||
| Limited partners' capital account, units authorized for issuance (in shares) | 11,900,000 | |
| Limited partner unitholders, units remaining available (in shares) | 1,600,000 | |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 347,473 | |
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |