Cash and Cash Equivalents	3 Months Ended
	Mar. 31, 2023
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	Cash and Cash EquivalentsCash equivalents are short-term, highly liquid investments with insignificant interest rate risk and original maturities of three months or less at acquisition. At March 31, 2023, restricted and designated cash and investments totaled $15.2 million, of which $0.7 million was included in other current assets and $14.5 million was included in other non-current assets in the consolidated balance sheet. Restricted and designated cash and investments totaled $15.1 million at December 31, 2022, of which $0.8 million was included in other current assets and $14.3 million was included in other non-current assets in the consolidated balance sheet. The restricted funds represent deposits required by state agencies for self-insurance purposes and designated funds that are earmarked for a specific purpose and not for general business use.