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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

A summary of the Company’s stock option activity is as follows:

	Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
Options outstanding as of December 31, 2018		956,164			21.58
Granted		210,243			18.40
Exercised		(58,404	)		6.57
Forfeited		(17,164	)		23.81
Cancelled		(24,868	)		21.18
Options outstanding as of December 31, 2019		1,065,971		$	21.75	$	0.4

Options exercisable as of December 31, 2019		623,487		$	20.96	$	0.4

The fair value of each option grant was estimated at the date of grant using the following assumptions:

A summary of activity for restricted stock units is as follows:

	Shares			Weighted Average Grant Date Fair Value Per Share
Unvested as of December 31, 2018		219,917			25.37
Granted		229,044			18.39
Vested		(154,295	)		20.26
Forfeited		(4,103	)		27.34
Unvested as of December 31, 2019		290,563		$	22.55

The fair value of each total shareholder return performance stock unit was estimated at the date of grant using the following assumptions:

A summary of activity for performance stock units is as follows:

	Shares			Weighted Average Grant Date Fair Value Per Share
Unvested as of December 31, 2018		337,124			28.02
Granted		228,037			22.01
Vested		(74,315	)		25.73
Forfeited		(78,441	)		20.24
Unvested as of December 31, 2019		412,405		$	26.58