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Stockholders' Equity (Tables) | 3 Months Ended
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Oct. 31, 2021
Stockholders' Equity Note [Abstract] |
Schedule of Weighted-Average Assumptions to Estimate Option Grant Date Fair Values | The weighted-average assumptions used in the Black-Scholes valuation model are reflected in the following table:
|  | Three months ended October 31,
Black-Scholes Option Valuation Assumptions |  | 2021 |  | 2020
Expected term (in years) |  | 6.14 |  | 6.21
Expected volatility |  | 29.98 | % |  | 30.71 | %
Expected dividend yield |  | 2.29 | % |  | 2.49 | %
Risk-free interest rate |  | 0.96 | % |  | 0.38 | %
Schedule of Stock Option Activity | The following is a summary of stock option activity for the three months ended October 31, 2021:
Time-Based Options |  | Options Outstanding |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at July 31, 2021 |  | 1,474,068 |  | $ | 38.45 |  |  |  |  |
New grants |  | 241,297 |  | 49.79 |  |  |  |  |
Exercised |  | (14,652) |  | 29.30 |  |  |  |  |
Forfeited or expired |  | — |  | — |  |  |  |  |
Outstanding at October 31, 2021 |  | 1,700,713 |  | $ | 40.14 |  |  | 6.8 |  | $ | 19,961 |
Exercisable at October 31, 2021 |  | 1,189,747 |  | $ | 37.30 |  |  | 5.8 |  | $ | 17,317 |
Schedule of RSU Activity | The following is a summary of RSU activity for the three months ended October 31, 2021:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value
Non-vested RSUs as of July 31, 2021 |  | 156,466 |  |  | $ | 45.40 |
Granted |  | 60,876 |  |  | 49.85 |
Vested |  | (67,116) |  |  | 45.49 |
Forfeited |  | — |  |  | — |
Non-vested RSUs as of October 31, 2021 |  | 150,226 |  |  | $ | 47.17 |
Schedule of PRSU Activity | The following is a summary of PRSU activity for the three months ended October 31, 2021:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value
Non-vested PRSUs as of July 31, 2021 |  | 119,281 |  |  | $ | 61.05 |
Granted (1) |  | 76,743 |  |  | 61.76 |
Vested (1) |  | (76,885) |  |  | 50.70 |
Forfeited |  | — |  |  | — |
Non-vested PRSUs as of October 31, 2021 |  | 119,139 |  |  | $ | 65.18 |
(1) Includes 44,350 shares granted and vested during the three months ended October 31, 2021, resulting from the payout of PRSUs granted in fiscal year 2019 due to achievement of performance metrics exceeding the target payout.

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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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