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Partners' Capital, Mezzanine Equity and Distributions (Class A Convertible Preferred Units Narrative) (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended |
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Sep. 01, 2024 USD ($) director shares | Sep. 01, 2022 | Mar. 01, 2019 quarter | Nov. 14, 2018 USD ($) shares | Aug. 14, 2018 USD ($) shares | May 15, 2018 USD ($) shares | Feb. 14, 2018 USD ($) shares | Nov. 14, 2017 USD ($) shares | Sep. 01, 2017 USD ($) buyer $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) shares | Sep. 01, 2019 USD ($)
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Class A convertible preferred units issued (in units) | shares |  |  |  |  |  |  |  |  |  | 24,438,022 | 24,438,022 | 22,411,728 |
Accumulated distributions to preferred unitholders |  |  |  |  |  |  |  |  |  | $ 69,800 | $ 69,800 |  |
Class A Convertible Preferred Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Private placement of convertible preferred units |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |
Number of shares authorized to be converted (in units) | shares |  |  |  |  |  |  |  |  | 7,416,498 |  |  |  |
Consecutive period for shares to be converted |  |  |  |  |  |  |  |  | 12 months |  |  |  |
Minimum number of shares outstanding authorized to be converted (in units) | shares |  |  |  |  |  |  |  |  | 592,768 |  |  |  |
Volume weighted average price percentage |  |  |  |  |  |  |  |  | 95.00% |  |  |  |
Consideration payable to holders in cash for change of control percentage |  |  |  |  |  |  |  |  | 90.00% |  |  |  |
Threshold trading days to notify holders |  |  |  |  |  |  |  |  | 30 days |  |  |  |
Consecutive trading days in period ending on fifth trading day |  |  |  |  |  |  |  |  | 30 days |  |  |  |
Change in control multiplier price percentage |  |  |  |  |  |  |  |  | 101.00% |  |  |  |
Distribution paid-in-kind (in units) | shares |  |  |  | 523,132 | 511,934 | 500,976 | 490,252 | 162,234 |  | 534,576 | 2,026,294 | 162,234 |
Distributions paid-in-kind |  |  |  | $ 17,635 | $ 17,257 | $ 16,888 | $ 16,526 | $ 5,469 |  |  | $ 68,306 | $ 5,469 |
Accumulated distributions to preferred unitholders |  |  |  |  |  |  |  |  |  | $ 69,800 | $ 69,800 |  |
Class A Convertible Preferred Stock Units | In Arrears At Annual Rate |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend rate percentage |  |  |  |  |  |  |  |  | 8.75% |  |  |  |
Dividend amount (in dollars per unit) | $ / shares |  |  |  |  |  |  |  |  | $ 2.9496 | $ 2.9496 |  |  |
Class A Convertible Preferred Stock Units | Quarterly Rate |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend rate percentage |  |  |  |  |  |  |  |  | 2.1875% |  |  |  |
Dividend amount (in dollars per unit) | $ / shares |  |  |  |  |  |  |  |  | $ 0.7374 | $ 0.7374 |  |  |
Class A Convertible Preferred Stock Units | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold trading days to notify holders |  | 30 days |  |  |  |  |  |  |  |  |  |  |
Basis spread |  |  | 2.00 |  |  |  |  |  |  |  |  |  |
Reset rate |  | 10.75% |  |  |  |  |  |  |  |  |  |  |
Percentage below issue price |  | 110.00% |  |  |  |  |  |  |  |  |  |  |
Percentage of holders required to approve rate reset election |  | 25.00% |  |  |  |  |  |  |  |  |  |  |
Multiplier liquidation value percentage prior to September 1, 2024 | 110.00% |  |  |  |  |  |  |  |  |  |  |  |
Multiplier liquidation value percentage thereafter | 105.00% |  |  |  |  |  |  |  |  |  |  |  |
Conversion ratio | 1 |  |  |  |  |  |  |  |  |  |  |  |
Aggregate amount of conversion required, minimum |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000
Number of quarters in trading period | quarter |  |  | 2 |  |  |  |  |  |  |  |  |  |
Aggregate amount of ownership required for initial purchasers to attend board meetings | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |
Percentage required for initial purchasers to purchase securities | 50.00% |  |  |  |  |  |  |  |  |  |  |  |
Aggregate number of ownership units required for initial purchasers to appoint directors (in units) | shares | 11,124,747 |  |  |  |  |  |  |  |  |  |  |  |
Number of directors that initial purchasers have right to appoint | director | 2 |  |  |  |  |  |  |  |  |  |  |  |
Class A Convertible Preferred Stock Units | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption premium percentage |  |  |  |  |  |  |  |  | 115.00% |  |  |  |
Class A Convertible Preferred Stock Units | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption premium percentage |  |  |  |  |  |  |  |  | 101.00% |  |  |  |
Class A Convertible Preferred Stock Units | LIBOR | Scenario, Forecast |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread |  | 7.50 |  |  |  |  |  |  |  |  |  |  |
Private Placement | Class A Convertible Preferred Stock Units |  |  |  |  |  |  |  |  |  |  |  |  |
Temporary Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Private placement of convertible preferred units |  |  |  |  |  |  |  |  | $ 750,000 |  |  |  |
Class A convertible preferred units issued (in units) | shares |  |  |  |  |  |  |  |  | 22,249,494 |  |  |  |
Cash purchase price per unit (in dollars per unit) | $ / shares |  |  |  |  |  |  |  |  | $ 33.71 |  |  |  |
Number of initial purchasers | buyer |  |  |  |  |  |  |  |  | 2 |  |  |  |

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