Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement, Noncash Expense [Abstract]

Schedule of components of stock compensation expense

The components of stock-based compensation expense for the three and six months ended June 30, 2019 and 2018 were as follows:

	Three months ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
	(in thousands)				(in thousands)
2007 Stock Incentive Plan	$	1,143	$	1,660	$	2,402	$	2,565
2018 Stock Incentive Plan	975		—		975		—
Employee Stock Purchase Plan	4		—		10		20
Total Stock Compensation Expense	$	2,122	$	1,660	$	3,387	$	2,585

Summary of restricted stock activity

The following table summarizes restricted stock activity during the six months ended June 30, 2019:

	Shares
Restricted stock at December 31, 2018	417,890
Shares granted	279,400
Shares forfeited	(2,666	)
Shares vested	(183,624	)
Restricted stock at June 30, 2019	511,000