Net Income Per Unit

We use the two-class method when calculating the net income per unit applicable to limited partners because we have more than one participating class of securities. Our participating securities consist of common units, general partner units and IDRs. The two-class method is based on the weighted-average number of common units outstanding during the period. Basic net income per unit applicable to limited partners is computed by dividing limited partners’ interest in net income, after deducting our general partner’s 2% interest and IDRs, by the weighted-average number of outstanding common units. Our net income is allocated to our general partner and limited partners in accordance with their respective partnership percentages after giving effect to priority income allocations for IDRs, which are held by our general partner pursuant to our Partnership Agreement. The IDRs are paid following the close of each quarter.

Earnings in excess of distributions are allocated to our general partner and limited partners based on their respective ownership interests. Payments made to our unitholders are determined in relation to actual distributions declared and are not based on the net income allocations used in the calculation of net income per unit.

Diluted net income per unit applicable to common limited partners includes the effects of potentially dilutive units on our common units. At present, the only potentially dilutive units outstanding consist of unvested phantom units.

Our distributions earned with respect to a given period are declared subsequent to quarter end. Therefore, the table below represents total cash distributions applicable to the period in which the distributions are earned. The expected date of distribution for the distributions earned during the period ended June 30, 2018 is August 13, 2018. The calculation of net income per unit is as follows (dollars in thousands, except units and per unit amounts):



	Three Months Ended					Six Months Ended
	June 30,					June 30,
	2018		2017			2018			2017
Net income attributable to partners	$	25,582	$	18,977		$	45,577		$	33,572
Less: General partner's distribution (including IDRs) ⁽¹⁾	6,200		4,608			11,910			8,845
Less: Limited partners' distribution	18,784		17,175			37,071			33,962
Earnings in excess (deficit) of distributions	$	598	$	(2,806	)	$	(3,404	)	$	(9,235	)

General partner's earnings:
Distributions (including IDRs) ⁽¹⁾	$	6,200	$	4,608		$	11,910		$	8,845
Allocation of earnings in excess (deficit) of distributions	12		(56		)	(68		)	(184		)
Total general partner's earnings	$	6,212	$	4,552		$	11,842		$	8,661

Limited partners' earnings on common units:
Distributions	$	18,784	$	17,175		$	37,071		$	33,962
Allocation of earnings in excess (deficit) of distributions	586		(2,750		)	(3,336		)	(9,051		)
Total limited partners' earnings on common units	$	19,370	$	14,425		$	33,735		$	24,911

Weighted average limited partner units outstanding ⁽²⁾:
Common units - (basic)	24,386,031		24,335,338			24,384,341			24,331,991
Common units - (diluted)	24,394,103		24,375,946			24,391,760			24,371,540

Net income per limited partner unit ⁽²⁾:
Common units - (basic)	$	0.79	$	0.59		$	1.38		$	1.02
Common units - (diluted)	$	0.79	$	0.59		$	1.38		$	1.02

⁽¹⁾General partner distributions (including IDRs) consist of the 2% general partner interest and IDRs, which represent the right of the general partner to receive increasing percentages of quarterly distributions of available cash from operating surplus in excess of $0.43125 per unit per quarter. See Note 9 for further discussion related to IDRs.

⁽²⁾ We base our calculation of net income per unit on the weighted-average number of common limited partner units outstanding during the period.