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Long-Term Obligations and Short-Term Note Payable (Tables) | 12 Months Ended
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Dec. 31, 2014
Debt Disclosure [Abstract] |
Schedule of Maturities of Long-term Debt [Table Text Block] | Principal maturities of the Partnership's existing third party debt instruments for the next five years and thereafter are as follows as of December 31, 2014 (in thousands):
|  | 2015 |  | 2016 |  | 2017 |  | 2018 |  | 2019 |  | Thereafter |  | Total
Second Amended and Restated Credit Agreement |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 251,750 |  |  | $ | — |  |  | $ | 251,750 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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