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v3.22.2

Stock Based Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) shares | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) d $ / shares shares | Jun. 30, 2021 USD ($) $ / shares shares | Dec. 31, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Issuance of common stock under employee stock purchase plan | $ |  |  | $ 5,235 | $ 4,232 |
Share-based compensation expense | $ | $ 7,703 | $ 5,869 | $ 14,420 | $ 11,599 |
Restricted Stock And Restricted Stock Unit (RSU) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) |  |  | 132,117 | 90,286 |
Restricted Stock And Restricted Stock Unit (RSU) | Board of Directors |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting periods |  |  | 1 year |  |
Restricted Stock And Restricted Stock Unit (RSU) | Chief Executive Officer |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting periods |  |  | 8 years |  |
Market-based Restricted Stock Awards |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) |  |  | 100,193 | 73,094 |
Trading days | d |  |  | 20 |  |
Trading days, lookback | d |  |  | 30 |  |
Weighted-average grant-date fair values of restricted stock awards granted (in usd per share) | $ / shares |  |  | $ 87.11 | $ 94.40 |
Weighted-average period to recognize compensation cost (in years) |  |  | 3 years 2 months 12 days |  |
Restricted Stock, Restricted Stock Unit (RSU), Market-based Restricted Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation cost related to non-vested awards granted | $ | $ 52,900 |  | $ 52,900 |  | $ 44,300
Restricted Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Granted (in shares) |  |  | 232,310 |  |
Weighted-average period to recognize compensation cost (in years) |  |  | 3 years 10 months 24 days |  |
ESPP |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum issuance of common stock (in shares) | 2,000,000 |  | 2,000,000 |  |
Market value of common stock on the date of grant for incentive stock options |  |  | 85.00% |  |
Maximum earnings withheld by the employees | 15.00% |  | 15.00% |  |
Estimated forfeiture rate |  |  | 11.15% | 11.15% |
Issuance of shares under employee stock purchase plan (in shares) |  |  | 76,741 | 58,145 |
Number of shares available for issuance (in shares) | 1,218,950 |  | 1,218,950 |  |
Share-based compensation expense | $ | $ 800 | $ 700 | $ 1,500 | $ 1,300 |
Minimum | Restricted Stock And Restricted Stock Unit (RSU) | Senior Staff |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting periods |  |  | 4 years |  |
Maximum | Restricted Stock And Restricted Stock Unit (RSU) | Senior Staff |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting periods |  |  | 5 years |  |
2007 Stock Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum issuance of common stock (in shares) | 4,500,000 |  | 4,500,000 |  |
Purchase price of common stock, percent |  |  | 85.00% |  |
Number of options outstanding (in shares) | 0 |  | 0 |  |
Number of stocks outstanding (in shares) | 0 |  | 0 |  |
2015 Stock Option Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Maximum issuance of common stock (in shares) | 4,200,000 |  | 4,200,000 |  |
Number of options outstanding (in shares) | 435,135 |  | 435,135 |  |
Number of stocks outstanding (in shares) | 506,962 |  | 506,962 |  |
2015 Stock Option Plan | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Market value of common stock on the date of grant for incentive stock options |  |  | 100.00% |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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