Organization And Summary Of Significant Accounting Policies Common Unit Issuance (Details) (USD $)	1 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2012	Mar. 31, 2011
Capital Unit [Line Items]
Proceeds from common unit issuances, net of issuance costs		$ 297,302,000	$ 0
Repayments of Long-term Debt	$ 87,500,000
Common Unit Public Offering [Member]
Capital Unit [Line Items]
Partners' Capital Account, Units, Sold in Public Offering	12,650,000
Common Issuance Price Per Unit	$ 24.47
Senior note redeemable portion	35.00%