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Cash Distributions and Net Income (Loss) per Common Unit - Summary Schedule of Distributions Paid (Details) (USD $)
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1 Months Ended | 3 Months Ended | 6 Months Ended | |||||||||
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Sep. 30, 2011
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Jun. 30, 2012
Capital Unit, Class B
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Dec. 31, 2011
Capital Unit, Class B
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Jun. 30, 2012
Cash Distribution
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Jun. 30, 2012
Cash Distribution
October 1, 2011 to December 31, 2011
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Jun. 30, 2012
Cash Distribution
January 1, 2012 to March 31, 2012
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Jun. 30, 2012
Cash Distribution
General Partner Units
October 1, 2011 to December 31, 2011
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Jun. 30, 2012
Cash Distribution
General Partner Units
January 1, 2012 to March 31, 2012
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Jun. 30, 2012
Cash Distribution
Common Units
Limited Partner Units
October 1, 2011 to December 31, 2011
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Jun. 30, 2012
Cash Distribution
Common Units
Limited Partner Units
January 1, 2012 to March 31, 2012
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Jun. 30, 2012
Cash Distribution
Subordinated Units
Limited Partner Units
October 1, 2011 to December 31, 2011
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Jun. 30, 2012
Cash Distribution
Subordinated Units
Limited Partner Units
January 1, 2012 to March 31, 2012
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| Distribution Made to Member or Limited Partner [Line Items] | ||||||||||||
| Required distribution period of available cash | 45 days | |||||||||||
| Date paid | 2/14/2012 | 5/14/2012 | ||||||||||
| Cash distribution per common unit | $ 0.425 | $ 0.425 | ||||||||||
| Cash distribution paid | $ 269,000 | $ 272,000 | $ 13,176,000 | $ 13,323,000 | $ 0 | $ 0 | ||||||
| Class B unitholders, units issued | 11,111,111 | 0 | ||||||||||
| Price per Common Unit | 15.25 | 15.00 | ||||||||||
| Proceeds from issuance of Class B Units | 166,700,000 | |||||||||||
| Limited Partner Units, Issue Discount | $ 151,700,000 | |||||||||||