Commitments And Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments And Contingencies [Abstract]
Commitments And Contingencies	15. COMMITMENTS AND CONTINGENCIES Rental expense was $42.9 million, $40.3 million, and $36.4 million in 2021, 2020, and 2019, respectively.  For future minimum rental payments required under operating leases that have either initial or remaining noncancelable lease terms in excess of one year as of December 31, 2021, refer to Note 7, “Leases”. We are subject to various claims, disputes, and administrative and legal matters incidental to our past and current business activities.  As a result, contingencies can arise resulting from an existing condition, situation, or set of circumstances involving an uncertainty as to the realization of a possible loss. Estimated loss contingencies are accrued only if the loss is probable and the amount of the loss can be reasonably estimated.  With respect to a particular loss contingency, it may be probable that a loss has occurred but the estimate of the loss is a wide range.  If we deem an amount within the range to be a better estimate than any other amount within the range, that amount will be accrued. However, if no amount within the range is a better estimate than any other amount, the minimum amount of the range is accrued.  While we believe that none of these claims, disputes or administrative and legal matters will have a material adverse effect on our financial position, these matters are uncertain and we cannot at this time determine whether the financial impact, if any, of these matters will be material to our results of operations in the period in which such matters are resolved or a better estimate becomes available.