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Equity and Distributions, Distributions (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Distributions to Partners [Abstract] |  |  |
Number of days after quarter end to distribute available cash | 45 days |  |
Number of Designated Units excluded from distributions |  | 35,380,000 | 45,120,000
Cash Distribution [Member] | First Quarter 2014 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  |  | $ 0.3550
Record Date |  |  | Apr. 30, 2014
Payment Date |  |  | May 07, 2014
Cash Distribution [Member] | Second Quarter 2014 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  |  | $ 0.3600
Record Date |  |  | Jul. 31, 2014
Payment Date |  |  | Aug. 07, 2014
Cash Distribution [Member] | Third Quarter 2014 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  |  | $ 0.3650
Record Date |  |  | Oct. 31, 2014
Payment Date |  |  | Nov. 07, 2014
Cash Distribution [Member] | Fourth Quarter 2014 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  |  | $ 0.3700
Record Date |  |  | Jan. 30, 2015
Payment Date |  |  | Feb. 06, 2015
Cash Distribution [Member] | First Quarter 2015 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  | $ 0.3750 |
Record Date |  | Apr. 30, 2015 |
Payment Date |  | May 07, 2015 |
Cash Distribution [Member] | Second Quarter 2015 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  | $ 0.3800 |
Record Date |  | Jul. 31, 2015 |
Payment Date |  | Aug. 07, 2015 |
Cash Distribution [Member] | Third Quarter 2015 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  | $ 0.3850 |
Record Date |  | Oct. 30, 2015 |
Payment Date |  | Nov. 06, 2015 |
Cash Distribution [Member] | Fourth Quarter 2015 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) |  | $ 0.3900 |
Record Date |  | Jan. 29, 2016 |
Payment Date |  | Feb. 05, 2016 |
Cash Distribution [Member] | First Quarter 2016 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) | $ 0.3950 |  |
Record Date | Apr. 29, 2016 |  |
Payment Date | May 06, 2016 |  |
Cash Distribution [Member] | Second Quarter 2016 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) | $ 0.4000 |  |
Record Date | Jul. 29, 2016 |  |
Payment Date | Aug. 05, 2016 |  |
Cash Distribution [Member] | Third Quarter 2016 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) | $ 0.4050 |  |
Record Date | Oct. 31, 2016 |  |
Payment Date | Nov. 07, 2016 |  |
Cash Distribution [Member] | Fourth Quarter 2016 Distribution [Member] |  |  |
Distributions to Partners [Abstract] |  |  |
Distribution Per Common Unit (in dollars per unit) | $ 0.4100 |  |
Record Date | Jan. 31, 2017 |  |
Payment Date | Feb. 07, 2017 |  |

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