Share and Unit-Based Plans (Tables)

9 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of LTIP Units Granted

During the nine months ended September 30, 2019, the Company granted the following LTIP Units:

Grant Date	Units	Type	Fair Value per LTIP Unit		Vest Date
1/1/2019	81,732	Service-based	$	43.28	12/31/2021
1/1/2019	250,852	Market-indexed	$	29.25	12/31/2021
9/1/2019	4,393	Service-based	$	28.53	8/31/2022
9/1/2019	6,454	Market-indexed	$	19.42	8/31/2022
	343,431

Summary of activity of non-vested LTIP Units, stock awards, phantom stock and stock units

The following table summarizes the activity of the non-vested LTIP Units, phantom stock units and stock units:

	LTIP Units			Phantom Stock Units			Stock Units
	Units	Value(1)		Units	Value(1)		Units	Value(1)
Balance at January 1, 2019	661,578	$	48.38	—	$	—	129,457	$	64.21
Granted	343,431	32.40		21,580	41.61		159,116	37.57
Vested	(7,654)	59.85		(12,756)	42.87		(83,341)	63.63
Forfeited	(14,635)	34.26		—	—		(5,245)	51.48
Balance at September 30, 2019	982,720	$	42.91	8,824	$	39.79	199,987	$	43.59
(1) Value represents the weighted average grant date fair value.

Summary of activity of SARs and stock options outstanding

The following table summarizes the activity of the stock options outstanding:

	Stock Options
	Units	Value(1)
Balance at January 1, 2019	35,565	$	57.32
Granted	—	—
Exercised	—	—
Balance at September 30, 2019	35,565	$	57.32
(1) Value represents the weighted average exercise price.

Compensation cost under the share and unit-based plans

The following summarizes the compensation cost under the share and unit-based plans:

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2019		2018		2019		2018
LTIP Units	$	2,498	$	3,440	$	8,859	$	21,823
Stock units	632		972		3,836		5,717
Stock options	—		32		51		94
Phantom stock units	185		172		607		585
	$	3,315	$	4,616	$	13,353	$	28,219