19.	Share-based compensation

During the six months ended June 30, 2019, the Company granted RSUs to select officers, employees, non-employee members of the board of directors, and select non-employees under the Incentive Plan.

The Company estimates the fair value of RSUs on the grant date based on the closing price of the underlying shares on the grant date and other fair value adjustments to account for a post-vesting holding period. These fair value adjustments were estimated based on the Finnerty model.

For the six months ended June 30, 2019, cumulative compensation expense recognized for forfeited awards of $56 was reversed.

The following table summarizes the RSU activity for the six months ended June 30, 2019:

	Restricted Stock Units			Weighted- average grant date fair value per share
Non-vested RSUs as of December 31, 2018		—		$	—
Granted		5,404,823			13.48
Vested and shares issued		(1,284,383	)		13.53
Forfeited		(160,715	)		13.51
Non-vested RSUs as of June 30, 2019		3,959,725		$	13.46

During the six months ended June 30, 2019, the Company recognized a compensation expense of $28,008, of which $27,679 and $329 are recorded in Selling, general and administrative and Operations and maintenance, respectively. During the three months ended June 30, 2019, the Company recognized a compensation expense of $8,971, of which $8,711 and $260 are recorded in Selling, general and administrative and Operations and maintenance, respectively. The Company recognizes the income tax benefits resulting from vesting of RSUs in the period they vest, to the extent the compensation expense has been recognized.

As of June 30, 2019, the Company had 3,959,725 non-vested RSUs subject to service conditions and therefore had unrecognized compensation costs of approximately $42,629. The non-vested RSUs will vest over a period from ten months to three years following the grant date. The weighted-average remaining vesting period of non-vested RSUs totaled 1.53 years as of June 30, 2019.