Stockholders' Equity (Tables)

9 Months Ended

Jun. 30, 2019

Stock Options [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Assumptions Used in Estimate of Fair Value of Stock Option Awards

	Three-Months Ended				Nine-Months Ended
	June 30,				June 30,
	2019		2018		2019				2018
Weighted-average exercise price per share	$	n/a	$	n/a	$	79.12			$	78.91
Weighted-average grant date market value of Woodward stock	$	n/a	$	n/a	$	79.12			$	78.91
Expected term (years)		n/a		n/a		6.5	-	8.7		6.4	-	8.7
Estimated volatility		n/a		n/a		25.7%	-	31.0%		29.1%	-	32.7%
Estimated dividend yield		n/a		n/a		0.7%	-	0.8%		0.6%	-	0.8%
Risk-free interest rate		n/a		n/a		2.6%	-	3.1%		2.1%	-	2.8%

Summary of Activity for Stock Option Awards

	Three-Months Ended				Nine-Months Ended
	June 30, 2019				June 30, 2019
	Number of options		Weighted-Average Exercise Price per Share		Number of options		Weighted-Average Exercise Price per Share
Options, beginning balance		5,733	$	52.27		5,611	$	45.42
Options granted		-		n/a		900		79.12
Options exercised		(279)		34.27		(1,024)		32.92
Options expired		(1)		69.13		(2)		72.58
Options forfeited		(12)		67.92		(44)		68.51
Options, ending balance		5,441		53.16		5,441		53.16

Changes in Non-vested Stock Options

	Three-Months Ended				Nine-Months Ended
	June 30, 2019				June 30, 2019
	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		2,058	$	23.36		1,988	$	21.64
Options granted		-		n/a		900		23.99
Options vested		-		n/a		(798)		19.80
Options forfeited		(12)		22.67		(44)		22.91
Non-vested options outstanding, ending balance		2,046		23.37		2,046		23.37

Stock Options Vested, or Expected to Vest and Exercisable

	Number		Weighted- Average Exercise Price		Weighted- Average Remaining Life in Years		Aggregate Intrinsic Value
Options outstanding		5,441	$	53.16		6.0	$	331,053
Options vested and exercisable		3,395		42.12		4.7		244,017
Options vested and expected to vest		5,336		52.70		6.0		327,112

Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Activity for Restricted Stock Units

	Three-Months Ended				Nine-Months Ended
	June 30, 2019				June 30, 2019
		Number		Fair Value per Share		Number		Fair Value per Share
Beginning balance		10	$	82.71		10	$	82.71
Shares granted		2		97.56		2		97.56
Shares vested		-		n/a		-		n/a
Shares forfeited		-		n/a		-		n/a
Ending balance		12		84.71		12		84.71