Stockholders' Equity (Tables) - Stock Options [Member]

9 Months Ended

Jun. 30, 2021

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Activity for Stock Option Awards

The following is a summary of the activity for stock option awards during the three and nine-months ended June 30, 2021:

	Three-Months Ended					Nine-Months Ended
	June 30, 2021					June 30, 2021
	Number of options			Weighted-Average Exercise Price per Share		Number of options			Weighted-Average Exercise Price per Share
Options, beginning balance		5,517		$	67.50		5,443		$	62.00
Options granted		—			—		773			82.46
Options exercised		(91	)		41.21		(787	)		40.96
Options forfeited		(19	)		78.92		(22	)		80.34
Options, ending balance		5,407			67.91		5,407			67.91

Changes in Non-vested Stock Options

Changes in non-vested stock options during the three and nine-months ended June 30, 2021 were as follows:

	Three-Months Ended					Nine-Months Ended
	June 30, 2021					June 30, 2021
	Number of options			Weighted-Average Grant Date Fair Value per Share		Number of options			Weighted-Average Grant Date Fair Value Per Share
Non-vested options outstanding, beginning balance		2,106		$	25.81		2,078		$	24.69
Options granted		—			—		773			28.22
Options vested		—			—		(742	)		25.19
Options forfeited		(19	)		24.97		(22	)		25.01
Non-vested options outstanding, ending balance		2,087			25.82		2,087			25.82

Stock Options Vested, or Expected to Vest and Exercisable

Information about stock options that have vested, or are expected to vest, and are exercisable at June 30, 2021 was as follows:

	Number of options		Weighted-Average Exercise Price		Weighted-Average Remaining Life in Years		Aggregate Intrinsic Value
Options outstanding		5,407	$	67.91		6.2	$	297,257
Options vested and exercisable		3,332		58.52		4.9		214,452
Options vested and expected to vest		5,333		67.72		6.2		294,203