Consolidated Statements Of Partners' Capital (USD $) In Thousands, except Share data	Total	Number Of Common Units [Member]
Partners' capital, value at Dec. 31, 2010	$ 669,264
Partners' capital, shares at Dec. 31, 2010		64,615,000
Net income (loss)	51,249	0
Cash distributions	(112,844)	0
Issuance of units for cash, shares		7,350,000
Partners' Capital Account, Sale of Units	184,969
Partners' capital, value at Dec. 31, 2011	792,638
Partners' capital, shares at Dec. 31, 2011		71,965,000
Partners' capital, units, other		12,000
Partners' capital, value at Sep. 30, 2012
Partners' capital, value at Dec. 31, 2011	792,638
Partners' capital, shares at Dec. 31, 2011		71,965,000
Net income (loss)	96,319	0
Cash distributions	(142,383)	0
Issuance of units for cash, shares		5,750,000
Partners' Capital Account, Sale of Units	169,421
Partners' Capital Account, Units, Converted		3,476,000
Partners' Capital Account, Exchanges and Conversions	0
Partners' capital, Other	500
Partners' capital, value at Dec. 31, 2012	916,495
Partners' capital, shares at Dec. 31, 2012	81,202,752	81,203,000
Net income (loss)	86,109	0
Cash distributions	(168,441)	0
Issuance of units for cash, shares		5,750,000
Partners' Capital Account, Sale of Units	263,574
Partners' Capital Account, Units, Converted		1,738,000
Partners' Capital Account, Exchanges and Conversions	0
Partners' capital, value at Dec. 31, 2013	$ 1,097,737
Partners' capital, shares at Dec. 31, 2013	88,690,985	88,691,000