Share and Unit-Based Plans (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of LTIP units granted

During the three months ended March 31, 2021, the Company granted the following LTIP Units:

Grant Date	Units	Type	Fair Value per LTIP Unit		Vest Date
1/1/2021	576,378	Service-based	$	10.67	12/31/2023
1/1/2021	1,005,073	Market-indexed	$	9.85	12/31/2023
	1,581,451

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, 2021	784,052	$	28.11	4,662	$	35.35	309,845	$	21.47
Granted	1,581,451	10.15		14,566	10.96		92,057	13.43
Vested	(16,467)	29.86		(5,691)	16.33		(72,407)	34.41
Forfeited	—	—		—	—		(987)	22.12
Balance at March 31, 2021	2,349,036	$	16.01	13,537	$	17.10	328,508	$	16.36
(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, 2021	37,515	$	54.34
Granted	—	—
Exercised	—	—
Balance at March 31, 2021	37,515	$	54.34
(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 March 31,
	2021		2020
LTIP Units	$	3,611	$	3,214
Stock units	1,327		2,202
Stock options	—		—
Phantom stock units	93		187
	$	5,031	$	5,603