PARTNERS' CAPITAL (Tables)

6 Months Ended

Jun. 30, 2014

Equity [Abstract]

Schedule of Partner Units Activity

Rollforwards of the number of common limited partner, subordinated limited partner and general partner units for the six months ended June 30 follow.

	Common	Subordinated	General partner	Total
Units, January 1, 2013	24,412,427	24,409,850	996,320	49,818,597
Units issued to affiliates in connection with the Bison Drop Down	1,553,849	—	31,711	1,585,560
Units issued to affiliates in connection with the Mountaineer Acquisition	3,107,698	—	63,422	3,171,120
Units, June 30, 2013	29,073,974	24,409,850	1,091,453	54,575,277

	Common	Subordinated	General partner	Total
Units, January 1, 2014	29,079,866	24,409,850	1,091,453	54,581,169
Units issued in connection with the March Equity 2014 Offering (1)	5,300,000	—	108,337	5,408,337
Units issued under LTIP (1)(2)	43,503	—	861	44,364
Units, June 30, 2014	34,423,369	24,409,850	1,200,651	60,033,870

__________

(1) Including issuance to general partner in connection with contributions made to maintain 2% general partner interest.

(2) Units issued to common unitholders is net of 14,047 units withheld to meet minimum statutory tax withholding requirements.

Schedule of partnership target distributions

	Total quarterly distribution per unit target amount	Marginal percentage interest in distributions
		Unitholders	General partner
Minimum quarterly distribution	$0.40	98.0%	2.0%
First target distribution	$0.40 up to $0.46	98.0%	2.0%
Second target distribution	above $0.46 up to $0.50	85.0%	15.0%
Third target distribution	above $0.50 up to $0.60	75.0%	25.0%
Thereafter	above $0.60	50.0%	50.0%

Details of Cash Distributions

Details of cash distributions declared to date follow.

Attributable to the quarter ended	Payment date	Per-unit distribution		Cash paid to common unitholders		Cash paid to subordinated unitholders		Cash paid to general partner interest		Cash paid for IDRs		Total distribution
		(Dollars in thousands, except per-unit amounts)
December 31, 2012	February 14, 2013	$	0.4100	$	10,009	$	10,008	$	408	$	—	$	20,425
March 31, 2013	May 15, 2013	0.4200		10,253		10,252		418		—		20,923
June 30, 2013	August 14, 2013	0.4350		12,647		10,618		475		—		23,740
September 30, 2013	November 14, 2013	0.4600		13,377		11,229		502		—		25,108
December 31, 2013	February 14, 2014	0.4800		13,958		11,717		528		163		26,366
March 31, 2014	May 15, 2014	0.5000		17,211		12,205		608		360		30,384