XML 47 R35.htm IDEA: XBRL DOCUMENT
v3.22.2

Stock Based Compensation (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Market-Based Restricted Stock Awards, Valuation Assumptions | The weighted-average fair values of market-based restricted stock awards granted have been estimated utilizing the following assumptions:
| June 30, 2022 |  | June 30, 2021
Underlying stock price at valuation date | $ | 99.32 |  |  | $ | 113.27 |
Expected volatility | 36.7 | % |  | 30.3 | %
Risk-free interest rate | 1.8 | % |  | 1.3 | %
Restricted Stock and Restricted Stock Unit Award Activity | Restricted stock award activity for the six months ended June 30, 2022 is set forth below:
| Shares |  | Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2022 | 383,963 |  |  | $ | 62.65 |
Granted | — |  |  | — |
Vested | (61,073) |  |  | 80.67 |
Canceled | (1,605) |  |  | 93.75 |
Nonvested at June 30, 2022 | 321,285 |  |  | $ | 60.36 |
Restricted stock unit activity for the six months ended June 30, 2022 is set forth below:
| Number of Shares |  | Weighted-Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value
Outstanding at January 1, 2022 | 360,743 |  |  |  |  |
Granted | 232,310 |  |  |  |  |
Vested | (73,433) |  |  |  |  |
Canceled | (12,658) |  |  |  |  |
Outstanding at a June 30, 2022 | 506,962 |  |  | 2.9 |  | $ | 37,783,878 |
Vested and expected to vest at June 30, 2022 | 506,962 |  |  | 2.9 |  | $ | 37,783,878 |
Employee Stock Purchase Plan, Valuation Assumptions | The compensation expense related to the Purchase Plan has been estimated utilizing the following assumptions:
| June 30, 2022 |  | June 30, 2021
Risk-free interest rate | 1.54 | % |  | 0.02 | %
Expected term (in years) | 0.5 |  | 0.5
Dividend yield | 0.00 | % |  | 0.00 | %
Expected volatility | 41.6 | % |  | 29.5 | %
Weighted average volatility | 41.6 | % |  | 29.5 | %

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Table Text Block] for Schedule of Share-based Payment Award, Performance Awards, Valuation Assumptions [Table Text Block] [Table] + References No definition available. + Details
Name: | zd_ScheduleofSharebasedPaymentAwardPerformanceAwardsValuationAssumptionsTableTextBlockTableTextBlock
Namespace Prefix: | zd_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration