Retirement Plans (Tables)	9 Months Ended
Sep. 30, 2021
Retirement Plans [Abstract]
Schedule Of Expenses For Retirement, Profit-Sharing Plans, Excess Benefit Plans And Other Similar Plans	Three months ended September 30, Nine months ended September 30,2021 2020 2021 2020$ 7,006 $ 11,506 $ 23,609 $ 18,445

Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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