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Stock Plans - Schedule of Stock Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Share-based Payment Arrangement [Abstract] |  |
Stock compensation expense | $ 3,293 | $ 3,522
Income tax expense | 794 | 859
Stock compensation expense, net of tax | $ 2,499 | $ 2,663

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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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