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v3.19.1

Long-Term Debt - Partnership Credit Facility (Details) - Revolving Credit Facility - Partnership Credit Facility - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Line of Credit Facility |  |  |
Letter of credit outstanding | $ 15,200,000 |  |
Debt instrument weighted average interest rate (percent) | 5.30% |  | 5.40%
Commitment fee amount | $ 500,000 | $ 500,000 |
Undrawn capacity under revolving credit facility | 834,300,000 |  |
Maximum |  |  |
Line of Credit Facility |  |  |
Undrawn capacity under revolving credit facility | $ 485,800,000 |  |
Base rate |  |  |
Line of Credit Facility |  |  |
Debt instrument, variable rate (percentage) | 2.70% |  |

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount of the fee for available but unused credit capacity under the credit facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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