Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Compensation Arrangement by Share-based Payment Award Restricted Profits Units, Vested and Expected to Vest [Table Text Block]

	Number of Restricted TRG Profits Units		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2020	22,411		$	54.73
Units recovered and cancelled (1)	(58	)	57.84
Vested and converted (2)	(14,199	)	57.84
Outstanding at June 30, 2020	8,154		$	49.29

(1) This reflects the recovery and cancellation of previously granted Restricted TRG Profits Units, which vested on March 1, 2020, as a result of the actual cash distributions made during the vesting period.

(2)

This represents the conversion of Restricted TRG Profits Units to TRG Units, which vested on March 1, 2020, and had previously satisfied certain tax–driven requirements.

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, TSR Performance-Based Profits Units, Vested and Expected to Vest [Table Text Block]

	Number of relative TSR Performance-based TRG Profits Units		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2020	50,420		$	22.81
Units recovered and cancelled (1)	(27,318	)	23.14
Vested and converted (2)	(4,757	)	23.14
Outstanding at June 30, 2020	18,345		$	22.22

(1) This reflects the recovery and cancellation of previously granted (300% of target grant amount) Relative TSR Performance-based TRG Profits Units, which vested on March 1, 2020, as a result of the performance payout ratio of 17% and the actual cash distributions made during the vesting period. That is, despite the completion of applicable employee service requirements, the number of Relative TSR Performance-based TRG Profits Units ultimately considered earned is determined by the extent to which the TSR market performance measure was achieved during the performance period.

(2) This represents the conversion of Restricted TRG Profits Units to TRG Units, which vested on March 1, 2020, and had previously satisfied certain tax–driven requirements.

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, NOI Performance-Based Profits Units, Vested and Expected to Vest1 [Table Text Block]

	Number of NOI Performance-based TRG Profits Units		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2020	50,420		$	2.99
Units recovered and cancelled (1)	(32,075	)	—
Outstanding at June 30, 2020	18,345		$	8.21

(1)

This reflects the recovery and cancellation of previously granted (300% of target grant amount) NOI Performance-based TRG Profits Units, which vested on March 1, 2020, as a result of the performance payout ratio of 0%. That is, despite the completions of applicable employee service requirements, the number of NOI Performance-based TRG Profits Units ultimately considered earned is determined by the extent to which the NOI performance measure was achieved during the performance period.

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

	Number of TSR PSU		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2020	29,375		$	82.95
Vested (1)	(2,492	)	79.60
Outstanding at June 30, 2020	26,883		$	83.26

(1) Based on our market performance relative to that of a peer group, the actual number of shares of common stock issued upon vesting on March 1, 2020 was 1,297 shares for the TSR PSU three-year grants. The shares of common stock were issued at 0.52x. That is, despite the completion of the applicable employee service requirements, the number of shares ultimately considered earned is determined by the extent to which the TSR market performance measure was achieved during the performance period.

Schedule of Nonvested NOI Performance-based Units Activity [Table Text Block]

	Number of NOI PSU		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2020	29,375		$	40.95
Granted	31,318		43.24
Vested (1)	(2,492	)	—
Outstanding at June 30, 2020	58,201		$	43.94

(1)

The actual number of shares of common stock issued upon vesting on March 1, 2020 was zero. That is, despite the completion of applicable employee service requirements, the number of shares ultimately considered earned is determined by the extent to which NOI was achieved during the performance period.

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

	Number of RSU		Weighted Average Grant-Date Fair Value
Outstanding at January 1, 2020	179,846		$	57.73
Granted	84,352		47.07
Vested	(41,974	)	67.05
Forfeited	(1,681	)	56.55
Outstanding at June 30, 2020	220,543		$	51.89