Consolidated Balance Sheets Parentheticals - shares shares in Thousands  | 
12 Months Ended | |
|---|---|---|
Dec. 31, 2016  | 
Dec. 31, 2015  | 
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| General Partner Ownership Interest Percentage | 2.00% | 2.00% | 
| General Partners' Capital Account, Units Issued | 6,894 | 6,894 | 
| General partner units outstanding | 6,894 | 6,894 | 
| Common Units [Member] | ||
| Limited Partners' Capital Account, Units Issued | 57,109 | 57,084 | 
| Partnership unitholders units outstanding | 57,109 | 57,084 | 
| Class B Units [Member] | ||
| Limited Partners' Capital Account, Units Issued | 145,333 | 145,333 | 
| Partnership unitholders units outstanding | 145,333 | 145,333 | 
| Subordinated Units [Member] | ||
| Limited Partners' Capital Account, Units Issued | 135,384 | 135,384 | 
| Partnership unitholders units outstanding | 135,384 | 135,384 | 
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- Definition The number of general partner units issued. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The number of general partner units outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The number of limited partner units issued. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The number of limited partner units outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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