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Capital - Private Perpetual Preferred Units (Details) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended | 9 Months Ended
--- | --- | ---
Aug. 31, 2014 | Sep. 30, 2014
Class of Stock [Line Items] |  |
Private Perpetual Preferred Units, Liquidation Preference Per Share | $ 16.62 |
Private Perpetual Preferred Units [Member] |  |
Class of Stock [Line Items] |  |
Payments of Private Perpetual Preferred Units Distributions |  | $ 0.2
Private Perpetual Preferred Unit, Dividends, Per Unit, Declared |  | $ 0.15
Private Perpetual Preferred Units Issued During Period, Units, New Issues | 1,609,813 |
Private Perpetual Preferred Units, Liquidation Preference Per Share | $ 16.62 |
Private Perpetual Preferred Units, Dividend Rate, Per Unit | $ 0.60 |
Private Perpetual Preferred Unit, Offering Expense | $ 1.4 |

X
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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