Benefit Plans

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Benefit Plans

15. Benefit Plans:

The following information is provided for (1) the Company-sponsored defined benefit pension plans covering employees in the U.S. and certain employees at its foreign subsidiaries, (2) the Company-sponsored unfunded plans to provide certain health care benefits to retired employees in the U.S. and Canada, and (3) the Company’s defined benefit supplementary retirement plans which provide benefits for certain U.S. employees in excess of qualified plan limitations.

Components of net periodic expense (benefit) are as follows:

Defined Benefit Pension Plans

	U.S.				Foreign
	Three months ended March 31,				Three months ended March 31,
	2020		2019		2020		2019
Service cost	$	192	$	219	$	997	$	806
Interest cost	2,152		2,507		707		833
Expected return on plan assets	(3,331)		(2,757)		(810)		(603)
Amortization of net loss	—		—		41		—
Amortization of prior service cost	—		—		6		—
Net periodic expense (benefit)	$	(987)	$	(31)	$	941	$	1,036

Supplemental Retirement Plans

	Three months ended March 31,
	2020		2019
Interest cost	$	86	$	121
Net periodic expense	$	86	$	121

Other Postretirement Benefit Plans

	Three months ended March 31,
	2020		2019
Service cost	$	—	$	3
Interest cost	24		38
Amortization of prior service credit	(58)		(33)
Amortization of net gain	(7)		(8)
Net periodic expense (benefit)	$	(41)	$	—