Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2017

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,
2017		2016		2017		2016
$	4,551	$	5,861	$	10,709	$	6,387