Related-Party Transactions, Summary of Affiliate Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 20, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
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| Concentration Risk, Percentage | 57.00% | 56.00% | 57.00% | 56.00% | ||||||||||||
| Revenue from Related Parties | [1] | $ 168,000 | $ 154,000 | $ 337,000 | $ 302,000 | |||||||||||
| Related Party Transaction, Expenses from Transactions with Related Party | 35,000 | 30,000 | 73,000 | 60,000 | ||||||||||||
| Related Party Gain (Loss) On Settlement And Reimbursements | [2] | 5,000 | 11,000 | 12,000 | 19,000 | |||||||||||
| Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 16,000 | 18,000 | 33,000 | 35,000 | ||||||||||||
| Volume Gains (Losses) Value | 2,000 | 2,000 | 3,000 | 4,000 | ||||||||||||
| Cost of Reimbursable Expense | $ 3,000 | $ 9,000 | 9,000 | $ 15,000 | ||||||||||||
| Distribution Made to Limited Partner, Cash Distributions Declared | $ 109,000 | |||||||||||||||
| Distribution Made to Limited Partner, Declaration Date | Oct. 18, 2016 | |||||||||||||||
| Distribution Made to Limited Partner, Distributions Declared, Per Unit | $ 0.810 | $ 0.780 | ||||||||||||||
| Distribution Made to Limited Partner, Distribution Date | Aug. 12, 2016 | May 13, 2016 | Feb. 12, 2016 | |||||||||||||
| Subsequent Event | ||||||||||||||||
| Distribution Made to Limited Partner, Cash Distributions Declared | $ 66,000 | |||||||||||||||
| Distribution Made to Limited Partner, Declaration Date | Jul. 20, 2016 | |||||||||||||||
| Distribution Made to Limited Partner, Distributions Declared, Per Unit | $ 0.842 | $ 0.8750 | [3] | |||||||||||||
| Distribution Made to Limited Partner, Distribution Date | [3] | Nov. 14, 2016 | ||||||||||||||
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