Stock-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense

The following table reflects stock-based compensation expense recorded during the three and six months ended March 31, 2019 and 2018 (in thousands):

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Restricted stock units	$	4,923	$	4,882	$	8,883	$	9,267
Employee stock purchase plan		198		192		414		370
Total stock-based compensation expense	$	5,121	$	5,074	$	9,297	$	9,637

Restricted Stock Unit Activity

The following table reflects restricted stock units granted during the six months ended March 31, 2019 and 2018:

		Time-Based		Performance-
	Total Units	Units	Stock Grants	Based Units
Six months ended March 31, 2019	789,409	327,500	38,520	423,389
Six months ended March 31, 2018	507,556	192,291	34,926	280,339

The following table summarizes restricted stock unit activity for the six months ended March 31, 2019:

		Weighted
		Average
		Grant-Date
	Shares	Fair Value
Outstanding at September 30, 2018	2,194,512	$	17.20
Granted	789,409		30.45
Vested	(961,436)		18.37
Forfeited	(37,083)		22.55
Outstanding at March 31, 2019	1,985,402		24.14