Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2018

A summary of the stock option activity for the nine months ended September 30, 2018 is presented below.



	Number of Shares		Weighted Average Exercise Price

Outstanding at January 1, 2018	4,636,353		$	5.20
Granted	—		$	—
Exercised	(3,625	)	$	14.00
Forfeited	(14,736	)	$	14.00
Expired	—		$	—
Canceled	—		$	—
Outstanding at September 30, 2018	4,617,992		$	5.17
Exercisable at September 30, 2018	4,040,320		$	3.90

The following table summarizes RSUs activity during the nine months ended September 30, 2018:



	Number of Shares		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	688,744		$	13.66
Granted	319,250		$	18.49
Vested	(500,360	)	$	13.87
Forfeited	(19,951	)	$	15.49
Expired	—		$	—
Canceled	—		$	—
Outstanding at September 30, 2018	487,683		$	16.53

The following table summarizes information about the PSUs that were outstanding at September 30, 2018:



Period Granted	Target Shares Outstanding at Beginning of Period	Target Shares Granted	Target Shares Vested	Target Shares Forfeited	Target Shares Outstanding at End of Period	Weighted Average Grant Date Fair Value per Share
2017	169,635	—	—	—	169,635	$	10.73
2018	—	178,975	—	—	178,975	$	27.51
Total	169,635	178,975	—	—	348,610	$	19.34