Income per Unit

The following is a summary of basic and diluted income per unit (in thousands, except unit and per unit amounts):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Net income available to common unitholders	$	190,354	$	38,116	$	258,550	$	261,302
Weighted average units outstanding—basic	149,777,524		138,467,947		149,352,237		138,481,046
Potentially dilutive common units:
Stock options	10,424		19,983		9,721		20,629
Unvested incentive units	82,184		86,190		75,049		65,752
Forward equity offering	1,264,749		—		2,611		—
Market performance-based awards	629,661		618,078		636,864		483,538
Weighted average units outstanding—diluted	151,764,542		139,192,198		150,076,482		139,050,965
Income per unit:
Basic	$	1.27	$	0.28	$	1.73	$	1.89
Diluted	$	1.25	$	0.27	$	1.72	$	1.88

We have excluded the following potentially dilutive securities in the calculations above as they would be antidilutive or not dilutive:



	Three Months Ended September 30,		Nine Months Ended September 30,
	2016	2015	2016	2015
Potentially dilutive Series E Cumulative Redeemable Preferred Units	2,488,354	4,567,661	2,880,254	4,440,429
Potentially dilutive Series F Cumulative Redeemable Preferred Units	1,925,208	2,896,800	1,942,351	2,816,110
Potentially dilutive Series G Cumulative Redeemable Preferred Units	2,632,407	3,960,900	2,655,847	3,850,569
Potentially dilutive Series H Cumulative Redeemable Preferred Units	3,857,518	5,804,286	3,891,866	5,642,608
Potentially dilutive Series I Cumulative Redeemable Preferred Units	2,635,488	—	2,658,955	—
Units subject to forward equity offering	—	10,500,000	—	10,500,000
Total	13,538,975	27,729,647	14,029,273	27,249,716