Consolidated Statements Of Partners' Capital - USD ($) $ in Thousands	Total	Partners' Capital	Partners' Capital Number of Common Units	Noncontrolling Interest
Partners' capital, value at Dec. 31, 2012	$ 916,495	$ 916,495		$ 0
Partners' capital, units at Dec. 31, 2012			81,203,000
Net income (loss)	86,109	86,109	$ 0	0
Cash distributions	(168,441)	(168,441)	$ 0	0
Issuance of units for cash, shares			5,750,000
Issuance of units for cash, net (Note 11)	263,574	263,574		0
Conversion of waiver units (in units)			1,738,000
Conversion of waiver units	0	0		0
Partners' capital, value at Dec. 31, 2013	1,097,737	1,097,737		0
Partners' capital, units at Dec. 31, 2013			88,691,000
Net income (loss)	106,202	106,202	$ 0	0
Cash distributions	(200,461)	(200,461)	$ 0	0
Issuance of units for cash, shares			4,600,000
Issuance of units for cash, net (Note 11)	225,725	225,725		0
Conversion of waiver units (in units)			1,738,000
Conversion of waiver units	0	0		0
Partners' capital, value at Dec. 31, 2014	$ 1,229,203	1,229,203		0
Partners' capital, units at Dec. 31, 2014	95,029,218		95,029,000
Net income (loss)	$ 421,585	422,528	$ 0	(943)
Noncontrolling interest from acquisition	(6,447)	0	0	(6,447)
Cash distributions	(256,389)	(256,389)	0	0
Cash distributions to noncontrolling interests	(960)	0	$ 0	(960)
Issuance of units for cash, shares			14,950,000
Issuance of units for cash, net (Note 11)	633,759	633,759		0
Partners' capital, value at Dec. 31, 2015	$ 2,020,751	$ 2,029,101		$ (8,350)
Partners' capital, units at Dec. 31, 2015	109,979,218		109,979,000