Retirement Plans Weighted average assumptions on pension plan (Tables)

12 Months Ended

Dec. 31, 2017

Weighted average assumptions on pension plan [Abstract]

Schedule Of Weighted Average Assumptions Based On The Pension Plan

	2017		2016		2015
Used to determine benefit obligation at year-end:
Discount rate	3.50	%	4.10	%	4.20	%
Used to determine net periodic benefit cost for the years ended December 31:
Discount rate	4.10		4.20		3.95
Expected long-term return on plan assets	7.25		7.50		7.50