Stockholders' Equity Schedule of Stockholders' Equity (Tables)

3 Months Ended

6 Months Ended

Jan. 31, 2020

Jan. 31, 2019

Jan. 31, 2020

Jan. 31, 2019

Stockholders' Equity Note [Abstract]

Schedule of Stockholders Equity [Table Text Block]

The following table illustrates the changes in the balances of each component of stockholders' equity for the three months ended January 31, 2020:

	Common Stock		Additional Paid-In Capital		Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Loss			Total Stockholders' Equity
Balances at October 31, 2019	$	548	$	327,241	$	663,808		$	(43,779	)	$	(71,283	)	$	876,535
Net income	—		—		33,553			—			—			33,553
Other comprehensive loss, net of tax	—		—		—			—			(1,207		)	(1,207		)
Issuance of shares of Class A Common Stock under stock plan	—		187		—			624			—			811
Tax benefit and withholdings from deferred compensation distributions	—		69		—			—			—			69
Stock-based compensation expense	—		1,766		—			—			—			1,766
Cash dividends on Common Stock
Class A — $0.22 per share	—		—		(10,833		)	—			—			(10,833		)
Class B — $0.22 per share	—		—		(770		)	—			—			(770		)
Balances at January 31, 2020	$	548	$	329,263	$	685,758		$	(43,155	)	$	(72,490	)	$	899,924

The following table illustrates the changes in the balances of each component of stockholders' equity for the three months ended January 31, 2019:

	Common Stock		Additional Paid-In Capital			Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Loss			Total Stockholders' Equity
Balances at October 31, 2018	$	548	$	326,182		$	570,858		$	(58,414	)	$	(66,231	)	$	772,943
Net income	—		—			29,227			—			—			29,227
Other comprehensive loss, net of tax	—		—			—			—			5,666			5,666
Issuance of shares of Class A Common Stock under stock plan	—		(162		)	—			5,235			—			5,073
Tax benefit and withholdings from deferred compensation distributions	—		118			—			—			—			118
Stock-based compensation expense	—		2,840			—			—			—			2,840
Purchase of shares of Class A Common Stock	—		—			—			(1,319		)	—			(1,319		)
Cash dividends on Common Stock
Class A — $0.21 per share	—		—			(10,415		)	—			—			(10,415		)
Class B — $0.21 per share	—		—			(752		)	—			—			(752		)
Balances at January 31, 2019	$	548	$	328,978		$	588,918		$	(54,498	)	$	(60,565	)	$	803,381

The following table illustrates the changes in the balances of each component of stockholders' equity for the six months ended January 31, 2020:

	Common Stock		Additional Paid-In Capital			Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Loss			Total Stockholders' Equity
Balances at July 31, 2019	$	548	$	329,969		$	637,843		$	(46,332	)	$	(71,254	)	$	850,774
Net income	—		—			71,051			—			—			71,051
Other comprehensive loss, net of tax	—		—			—			—			(1,236		)	(1,236		)
Issuance of shares of Class A Common Stock under stock plan	—		(6,223		)	—			3,177			—			(3,046		)
Tax benefit and withholdings from deferred compensation distributions	—		133			—			—			—			133
Stock-based compensation expense	—		5,384			—			—			—			5,384
Cash dividends on Common Stock
Class A — $0.44 per share	—		—			(21,655		)	—			—			(21,655		)
Class B — $0.42 per share	—		—			(1,481		)	—			—			(1,481		)
Balances at January 31, 2020	$	548	$	329,263		$	685,758		$	(43,155	)	$	(72,490	)	$	899,924

The following table illustrates the changes in the balances of each component of stockholders' equity for the six months ended January 31, 2019:

	Common Stock		Additional Paid-In Capital			Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Loss			Total Stockholders' Equity
Balances at July 31, 2018	$	548	$	325,631		$	553,454		$	(71,120	)	$	(56,401	)	$	752,112
Net income	—		—			59,864			—			—			59,864
Other comprehensive loss, net of tax	—		—			—			—			(4,164		)	(4,164		)
Issuance of shares of Class A Common Stock under stock plan	—		(4,667		)	—			19,804			—			15,137
Tax benefit and withholdings from deferred compensation distributions	—		209			—			—			—			209
Stock-based compensation expense	—		7,805			—			—			—			7,805
Purchase of shares of Class A Common Stock	—		—			—			(3,182		)	—			(3,182		)
Adoption of ASU 2014-09, "Revenue from Contracts with Customers"	—		—			(2,137		)	—			—			(2,137		)
Cash dividends on Common Stock
Class A — $0.43 per share	—		—			(20,818		)	—			—			(20,818		)
Class B — $0.41 per share	—		—			(1,445		)	—			—			(1,445		)
Balances at January 31, 2019	$	548	$	328,978		$	588,918		$	(54,498	)	$	(60,565	)	$	803,381