Share-based payments (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Summary of the restricted common stock award/unit activity

A summary of the restricted common stock award activity during the year ended December 31, 2020 is presented below:

	Shares	Weighted-Average Grant-Date Fair Value per Share ($)
Outstanding at January 1, 2020	53,389	40.60
Granted	18,673	32.83
Vested	(52,738)	40.55
Forfeited	(651)	44.13
Outstanding at December 31, 2020	18,673	32.83

A summary of the restricted common stock unit activity during the year ended December 31, 2020 is presented below:

	Units	Weighted-Average Grant-Date Fair Value per Share ($)
Outstanding at January 1, 2020	196,017	42.21
Granted	104,202	39.78
Converted	(32,242)	41.19
Forfeited	(37,049)	42.31
Outstanding at December 31, 2020	230,928	41.25
Nonvested at December 31, 2020	177,855	40.61

A summary of the stock option activity during the year ended December 31, 2020 is presented below:

	Units	Weighted-Average Exercise Price ($)
Outstanding at January 1, 2020	—	—
Granted	647,832	39.76
Forfeited	(14,552)	39.76
Outstanding and nonvested at December 31, 2020	633,280	39.76