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Long-Term Debt - Loans And Credit Facilities Terms and Compliance (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($)
Debt Instruments |
Covenant compliance | As of December 31, 2017, the Partnership was in compliance with all financial covenants prescribed in its debt agreements.
$250 Million Senior Unsecured Notes | Minimum |
Debt Instruments |
Free cash liquidity requirement | $ 20,000

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- Definition States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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