Income Taxes Income Taxes - Summary of Operating Loss and Tax Credit Carryforwards (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Pennsylvania
Operating Loss Carryforwards [Line Items]
Net Operating Loss	$ 404,403
General Business Credits \| Federal
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforwards	$ 1,819

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-3

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