Pension Plans And Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2019

Pension Plans And Other Postretirement Benefits [Abstract]

Components Of Net Periodic Benefit Costs

	Pension Benefits
	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Service cost	$	680	$	812	$	2,040	$	2,436
Interest cost		2,954		2,874		8,862		8,622
Expected return on plan assets		(3,818)		(4,553)		(11,454)		(13,659)
Amortization of prior service cost		155		132		465		396
Amortization of actuarial loss		1,982		1,823		5,946		5,469
Net periodic benefit cost	$	1,953	$	1,088	$	5,859	$	3,264
	Other
	Postretirement Benefits
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	2019		2018		2019		2018
Service cost	$	205	$	262	$	615	$	786
Interest cost		750		708		2,250		2,124
Expected return on plan assets		(621)		(677)		(1,863)		(2,031)
Amortization of prior service cost		(116)		(127)		(348)		(381)
Amortization of actuarial loss		166		296		498		888
Net periodic benefit cost	$	384	$	462	$	1,152	$	1,386