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Equity Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Share-based Compensation [Abstract] |
Schedule of Share-based Compensation, Phantom Units Award Activity | A summary of our unit award activity for the years ended December 31, 2017, 2016 and 2015, is set forth below:
|  | Number of Phantom Units |  | Weighted-Average Grant Price
Non-vested | December 31, 2014 | 215,464 |  |  | $ | 23.48 |
Granted |  | 11,836 |  |  | $ | 39.73 |
Vested |  | (82,228 | ) |  | $ | 23.55 |
Non-vested | December 31, 2015 | 145,072 |  |  | $ | 24.76 |
Granted |  | 12,475 |  |  | $ | 26.05 |
Vested |  | (69,094 | ) |  | $ | 24.66 |
Forfeited |  | (14,500 | ) |  | $ | 22.65 |
Non-vested | December 31, 2016 | 73,953 |  |  | $ | 25.49 |
Granted |  | 10,090 |  |  | $ | 32.20 |
Vested |  | (68,079 | ) |  | $ | 24.60 |
Non-vested | December 31, 2017 | 15,964 |  |  | $ | 33.54 |

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- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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