Series A Preferred Units (Tables)

12 Months Ended

Dec. 31, 2012

Temporary Equity Disclosure [Abstract]

Beginning And Ending Balances Of The Series A Preferred Units

The following table provides a reconciliation of the beginning and ending balances of the Series A Preferred Units for all income statement periods presented. The amount includes the accretion to redemption value of $80 million plus any accrued and unpaid distributions and accrued interest by deducting amounts from partners’ capital over the remaining periods until the mandatory redemption date of September 2, 2029.

	Units	Amount
Balance at January 1, 2011	4,371,586	$	71
Accretion to redemption value	—	—
Balance at December 31, 2011	4,371,586	71
Accretion to redemption value	—	2
Balance at December 31, 2012	4,371,586	$	73