Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2018

Stock-Based Compensation Plans

Schedule of components of stock compensation expense

	2018		2017		2016
	(in thousands)
2007 Stock Incentive Plan	$	5,353	$	4,207	$	3,681
Employee Stock Purchase Plan		57		63		36
Total Stock Compensation Expense	$	5,410	$	4,270	$	3,717

Summary of restricted stock activity

		Weighted Average		Aggregate Grant
	Number Outstanding	Grant Date Fair Value		Date Fair Value
Balance as of December 31, 2015	396,595	$	17.98	$	7,131,200
Shares granted	136,645		21.55		2,944,941
Shares forfeited	(20,377)		17.79		(362,536)
Shares vested	(213,528)		17.12		(3,655,269)
Balance as of December 31, 2016	299,335		20.24		6,058,336
Shares granted	215,603		24.89		5,365,731
Shares forfeited	(10,999)		24.38		(268,200)
Shares vested	(175,817)		19.61		(3,448,628)
Balance as of December 31, 2017	328,122		23.49		7,707,239
Shares granted	270,454		33.91		9,172,223
Shares forfeited	(9,900)		32.06		(317,430)
Shares vested	(170,786)		22.25		(3,799,213)
Balance as of December 31, 2018	417,890	$	30.54	$	12,762,819