Stock-Based Compensation (Tables)

9 Months Ended

Jun. 30, 2019

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

Stock-Based Compensation Expense

	Three Months Ended June 30,				Nine Months Ended June 30,
	2019		2018		2019		2018
Restricted stock units	$	4,881	$	4,431	$	13,764	$	13,698
Employee stock purchase plan		359		202		773		571
Total stock-based compensation expense	$	5,240	$	4,633	$	14,537	$	14,269

Restricted Stock Unit Activity

		Time-Based		Performance-
	Total Units	Units	Stock Grants	Based Units
Nine months ended June 30, 2019	792,103	330,006	38,708	423,389
Nine months ended June 30, 2018	528,075	208,097	35,356	284,622

		Weighted
		Average
		Grant-Date
	Shares	Fair Value
Outstanding at September 30, 2018	2,194,512	$	17.20
Granted	792,103		30.47
Vested	(1,048,085)		17.76
Forfeited	(42,580)		22.84
Outstanding at June 30, 2019	1,895,950		24.75