Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Plans [Abstract]

Schedule Of Expenses For Retirement, Profit-Sharing Plans, Excess Benefit Plans And Other Similar Plans

Three months ended June 30,				Six months ended June 30,
2021		2020		2021		2020
$	7,904	$	11,354	$	16,603	$	6,940