Employee Stock Benefit Plans - Share-based Compensation Expense - Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Employee Stock Benefit Plans
Share-based compensation expense	$ 6,601	$ 4,589	$ 12,690	$ 9,985
Income tax (expense) benefit	278		(442)
Total share-based compensation expense included in costs and expenses, net of tax	$ 6,879	$ 4,589	$ 12,248	$ 9,985

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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Amount, after tax, of expense for award under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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