Stock Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Summary of Restricted Stock Activity

The following table presents the restricted stock activity for the six months ended June 30, 2019 (in thousands, except per share amounts):

	Number of Restricted Stock	Weighted-Average Grant Date Fair Value		Total Intrinsic Value of Restricted Stock Vested
Outstanding at December 31, 2018	1,320	$	24.94
Granted	56	$	34.04
Forfeited	(47)	$	23.03
Vested (1)	(105)	$	24.72	$	3,521
Outstanding at June 30, 2019	1,224	$	25.44

(1) The increase in shares vested during the six months ended June 30, 2019 was due to the acceleration of stock-based compensation expense triggered by a change in control of KGS.