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Stock Plans and Share-Based Compensation - Shares Issued Under Employee Stock Purchase Plan (Details) - Stock Awards for Directors - Employee Stock - $ / shares shares in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares issued (in shares) | 730 | 726 | 747
Weighted average purchase price per share (in dollars per share) | $ 21.90 | $ 20.13 | $ 17.57

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Issued + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of shares issued 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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