Stockholder's Investments (Tables)

12 Months Ended

Jul. 31, 2018

Equity [Abstract]

Schedule of Capital Stock

Information as to the Company’s capital stock at July 31, 2018 and 2017 is as follows:

	July 31, 2018				July 31, 2017
	Shares Authorized	Shares Issued	(thousands) Amount		Shares Authorized	Shares Issued	(thousands) Amount
Preferred Stock, $.01 par value	5,000,000				5,000,000
Cumulative Preferred Stock: 6% Cumulative	5,000				5,000
1972 Series	10,000				10,000
1979 Series	30,000				30,000
Common Stock, $.01 par value: Class A Nonvoting	100,000,000	51,261,487	$	513	100,000,000	51,261,487	$	513
Class B Voting	10,000,000	3,538,628	35		10,000,000	3,538,628	35
			$	548			$	548

Schedule of Other Activity in Stockholders' Investment

The following is a summary of other activity in stockholders’ investment for the fiscal years ended July 31, 2018, 2017, and 2016:

	Deferred Compensation			Shares Held in Rabbi Trust, at cost			Total
Balances at July 31, 2015	$	5,684		$	(8,748	)	$	(3,064	)
Shares at July 31, 2015	252,261			362,025
Sale of shares at cost	$	(1,238	)	$	1,278		$	40
Purchase of shares at cost	178			(1,017		)	(839		)
Balances at July 31, 2016	$	4,624		$	(8,487	)	$	(3,863	)
Shares at July 31, 2016	201,418			347,081
Sale of shares at cost	$	(1,247	)	$	1,288		$	41
Purchase of shares at cost	315			(925		)	(610		)
Effect of plan amendment	4,432			—			4,432
Balances at July 31, 2017	$	8,124		$	(8,124	)	$	—
Shares at July 31, 2017	314,082			314,082
Sale of shares at cost	$	(977	)	$	977		$	—
Purchase of shares at cost	1,075			(1,075		)	—
Balances at July 31, 2018	$	8,222		$	(8,222	)	$	—
Shares at July 31, 2018	299,916			299,916

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

Black-Scholes Option Valuation Assumptions	2018			2017			2016
Expected term (in years)	6.07			6.11			6.11
Expected volatility	28.19		%	29.55		%	29.95		%
Expected dividend yield	2.72		%	2.70		%	2.59		%
Risk-free interest rate	1.96		%	1.26		%	1.64		%
Weighted-average market value of underlying stock at grant date	$	36.85		$	35.14		$	20.02
Weighted-average exercise price	$	36.85		$	35.14		$	20.02
Weighted-average fair value of options granted during the period	$	7.96		$	7.56		$	4.58

Summary of Stock Option Activity under Company's Share-Based Compensation Plans

for the fiscal year ended July 31, 2018:

	Option Price				Options Outstanding		Weighted Average Exercise Price
Balance as of July 31, 2017	$	19.96	—	$38.83	2,879,801		$	27.40
Options granted	36.85		—	36.85	364,046		36.85
Options exercised	19.96		—	38.31	(622,916	)	28.84
Options cancelled	19.96		—	38.31	(116,298	)	31.42
Balance as of July 31, 2018	$	19.96	—	$38.83	2,504,633		$	28.23

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about stock options outstanding at July 31, 2018:

	Options Outstanding				Options Outstanding and Exercisable
Range of Exercise Prices	Number of  Shares Outstanding at July 31, 2018	Weighted  Average Remaining Contractual Life (in years)	Weighted Average Exercise Price		Shares Exercisable at July 31, 2018	Weighted  Average Remaining Contractual Life (in years)	Weighted Average Exercise Price
$19.96 - $26.99	846,353	6.7	$	20.84	611,735	6.5	$	21.16
$27.00 - $32.99	978,233	3.3	29.24		977,506	3.3	29.24
$33.00 - $38.83	680,047	8.4	35.97		132,988	7.2	35.13
Total	2,504,633	5.8	$	28.23	1,722,229	4.7	$	26.82

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The following tables summarize the RSU and restricted share activity for the fiscal year ended July 31, 2018:

Time-Based RSUs and Restricted Shares	Shares		Weighted Average Grant Date  Fair Value
Balance as of July 31, 2017	517,108		$	25.61
New grants	94,457		36.80
Vested	(219,389	)	24.76
Forfeited	(49,320	)	26.94
Balance as of July 31, 2018	342,856		$	29.05

The time-based RSUs granted during the fiscal year ended July 31, 2017, had a weighted-average grant-date fair value of $35.15. The total fair value of time-based RSU's vested during the years ended July 31, 2018 and 2017, was $8,237 and $6,512, respectively.

Performance-Based RSUs	Shares		Weighted Average Grant Date Fair Value
Balance as of July 31, 2017	58,206		$	32.03
New grants	56,290		33.12
Vested	—		—
Forfeited	(6,399	)	32.57
Balance as of July 31, 2018	108,097		$	32.57

The performance-based RSUs granted during the year ended July 31, 2017, had a weighted-average grant-date fair value of $32.03. The aggregate intrinsic value of unvested time-based and performance-based RSU's outstanding at July 31, 2018 and 2017, and expected to vest, was $17,249 and $19,100, respectively.