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Stock-Based Compensation - Shares Purchased and Compensation Expenses for ESPP (Details) - 2012 Purchase Plan - USD ($) shares in Millions, $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2020
Share-based Compensation [Line Items] |  |  |  |
Shares purchased under the plans (in shares) | 0.1 | 0.3 | 0.2 | 0.3
Plan compensation expense | $ 0.6 | $ 1.9 | $ 1.5 | $ 1.7

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- Definition Number of shares purchased for issuance under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (l) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of cost expensed and capitalized for award under share-based payment arrangement. + 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 (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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