Share-based compensation (Tables)

9 Months Ended

Sep. 30, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of share-based compensation expense

The following table provides the total share-based compensation expense included in general and administrative expenses during the three and nine months ended September 30, 2019 and 2018:

	Three months ended				Nine months ended
	September 30, 2019		September 30, 2018		September 30, 2019		September 30, 2018
Management and director options	$	—	$	60	$	—	$	215
Restricted shares with service condition	379		166		1,513		445
Restricted shares with service and performance condition	515		2,172		4,793		4,296
	$	894	$	2,398	$	6,306	$	4,956

Schedule of management and director options outstanding

The following table summarizes information about the Company’s management and director share options outstanding and exercisable as of September 30, 2019:

Range of exercise prices	Number of options	Weighted average exercise price		Remaining contractual life
$10.00 - $10.89	4,774,694	$	10.04	2.3 years
$15.05 - $16.89	1,800,866	15.92		2.5 years
$20.00 - $25.05	1,731,098	20.28		2.5 years
	8,306,658	$	13.45	2.4 years

Schedule of restricted shares with service condition activity

Restricted share award activity for the nine months ended September 30, 2019 and year ended December 31, 2018 was as follows:

	Number of non- vested restricted shares		Weighted average grant date fair value
Balance as of January 1, 2018	18,209		$	12.15
Granted	50,644		13.45
Vested	(44,788	)	12.97
Balance as of January 1, 2019	24,065		13.35
Granted	398,429		11.11
Forfeited	(36,907	)	11.31
Vested	(35,706	)	13.31
Balance as of September 30, 2019	349,881		$	11.02

Schedule of restricted shares with performance condition activity

Restricted share award activity for the restricted shares with a service and performance condition for the nine months ended September 30, 2019 and year ended December 31, 2018 were as follows:

	Number of non- vested restricted shares		Number of non- vested restricted shares probable of vesting		Weighted average grant date fair value of shares probable of vesting
Balance as of January 1, 2018	1,855,379		887,203		$	12.60
Granted	556,403		370,931		14.01
Forfeited	(294,977	)	(4,102	)	13.98
Vested	(115,757	)	(115,757	)	14.00
Change in estimated restricted shares considered probable of vesting	n/a		46,945		13.35
Balance as of January 1, 2019	2,001,048		1,185,220		12.80
Granted	862,176		574,784		10.95
Forfeited	(823,977	)	(290,551	)	10.82
Vested	(148,718	)	(148,718	)	11.40
Change in estimated restricted shares considered probable of vesting	n/a		60,768		13.32
Balance as of September 30, 2019	1,890,529		1,381,503		$	12.45