Cash Distributions and Earnings per Unit (Tables)

6 Months Ended

Jun. 30, 2015

CASH DISTRIBUTIONS AND EARNINGS PER UNIT [Abstract]

Schedule of incentive distributions made to General Partners or Unitholders by distribution

		Marginal Percentage Interest in Distributions
	Total Quarterly Distribution Target Amount	Common Unitholders			General Partner
Minimum Quarterly Distribution	$0.35		98	%		2	%
First Target Distribution	up to $0.4025		98	%		2	%
Second Target Distribution	above $0.4025 up to $0.4375		85	%		15	%
Third Target Distribution	above $0.4375 up to $0.525		75	%		25	%
Thereafter	above $0.525		50	%		50	%

Schedule of earnings per unit, basic and diluted

	Three Month Period Ended						Six Month Period Ended
	June 30,  2015			June 30,  2014			June 30,  2015			June 30,  2014
Net income	$	11,355		$	29,985		$	22,234		$	48,346
Earnings attributable to:
Common unit holders		10,555			28,852			20,644			46,313
Weighted average units outstanding (basic and diluted)
Common unit holders		83,079,710			77,359,163			81,783,895			75,803,362
Earnings per unit (basic and diluted):
Common unit holders	$	0.13		$	0.37		$	0.25		$	0.61
Earnings per unit — distributed (basic and diluted):
Common unit holders	$	0.44		$	0.44		$	0.90		$	0.90
Loss per unit — undistributed (basic and diluted):
Common unit holders	$	(0.31	)	$	(0.07	)	$	(0.65	)	$	(0.29	)