Post-Retirement Plan	12 Months Ended
	Dec. 31, 2021
Post-Retirement Plan [Abstract]
Post-Retirement Plan	14. Post-Retirement Plan The Company has 401(k) plans available to substantially all employees. The Company generally makes matching contributions of 50% of employees’ salary deferral amounts on the first 6% of employees’ compensation. Contributions to the plans during the years ended December 31, 2021, 2020 and 2019 were $3.2 million, $2.5 million and $1.9 million, respectively.