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Cash and Cash Equivalents
9 Months Ended
Sep. 30, 2021
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents Disclosure
4.    Restricted cash and equivalents
The Company had restricted cash and cash equivalents of $92,867 and $176,832 at September 30, 2021 and December 31, 2020, respectively. The decrease in restricted cash and equivalents was primarily driven by the release of escrow funds in the third quarter of 2021 related to a resolved legal settlement, see Note 9 for further details. Substantially all of the restricted cash and equivalents balance at September 30, 2021 is held in trust to satisfy insurer and state regulatory requirements related to the wholly-owned captive insurance companies that bear professional and general liability and workers' compensation risks for the Company and the remaining restricted cash and cash equivalents held at September 30, 2021 represents cash pledged to third parties in connection with one of the Company's ancillary businesses.