Stockholders’ Equity (Tables)

3 Months Ended

Dec. 31, 2018

Stockholders’ Equity

Summary of assumptions used for the valuation of the RSUs with performance and market-based vesting that were granted

		RSU's granted during the three
		months ended December 31, 2018
Date of grant		November 21, 2018
Closing average share value (mean)	$	68.56
Performance period begins		October 1, 2018
Performance period ends		September 30, 2021
Risk-free interest rate		2.8%
Expected volatility		34%

Summary of RSU activity

	Unvested Restricted Stock Units
		Weighted-Average
	Number of Shares	Grant-Date Fair Value
Unvested at September 30, 2018	366,460	$	52.31
Granted	195,033		64.33
Vested	(128,949)		50.61
Forfeited	(15,391)		50.04
Unvested at December 31, 2018	417,153	$	58.54

	Unvested Restricted Stock Units with Performance Based Vesting
		Weighted-Average
	Number of Shares	Grant-Date Fair Value
Unvested at September 30, 2018	635,628	$	50.11
Granted	—		—
Vested	—		—
Forfeited	(295,759)		43.86
Unvested at December 31, 2018	339,869	$	55.54

	Unvested Restricted Stock Units with Performance and Market Based Vesting
		Weighted-Average
	Number of Shares	Grant-Date Fair Value
Unvested at September 30, 2018	—	$	—
Granted	219,890		67.40
Vested	—		—
Forfeited	—		—
Unvested at December 31, 2018	219,890	$	67.40

Schedule of stock-based compensation expense related to stock-based awards

We recorded non-cash compensation expense related to stock-based awards as follows (in thousands):

	Three Months Ended
	December 31,
	2018		2017
Cost of sales	$	313	$	156
Selling, general and administrative		2,407		1,471
	$	2,720	$	1,627