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Employment Benefits	12 Months Ended
Employment Benefits	Dec. 31, 2021
Employment Benefits [Abstract]
Employment Benefits	9. Employment Benefits We have employee 401(k) salary deferral plans covering all employees. Employees could make contributions by withholding a percentage of their salary up to the IRS annual limits of $20,500 and $27,000 in 2021 for employees under 50 years old and employees 50 years old or over, respectively. We made approximately $5.5 million, $5.7 million and $6.4 million in matching contributions for the years ended December 31, 2021, 2020 and 2019, respectively.

The entire disclosure for retirement benefits.

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+ Details