Letters of Credit	12 Months Ended
	Dec. 31, 2021
Financial Instruments Pledged as Collateral [Abstract]
Letters of Credit	Letters of CreditAs of December 31, 2021, the Company had $85.0 million in standby letters of credit secured by $75.0 million of restricted cash, of which $26.7 million had been drawn upon for issued letters of credit. As of December 31, 2020, the Company had a $30.0 million standby letters of credit secured by restricted cash, of which $23.6 million had been drawn upon for issued letters of credit.