Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2019

Defined benefit pension plans

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

The tables below set forth the components of the Company’s net periodic (income) expense relating to retirement benefit plans. The service cost component is recognized within selling, general and administrative expenses and cost of goods and services, depending on the functional area of the underlying employees included in the plans, and the non-operating components of pension costs are included within other income, net in the Condensed Consolidated Statements of Earnings. The amounts recorded to discontinued operations represent the net periodic benefit expense for several non-U.S. qualified and U.S. non-qualified plans that were transferred to Apergy at the spin-off date of May 9, 2018.

Qualified Defined Benefits

	Three Months Ended March 31,
	U.S. Plan				Non-U.S. Plans
	2019		2018		2019		2018
Service cost	$	1,754	$	2,984	$	1,545	$	1,577
Interest cost	4,756		5,102		1,241		1,378
Expected return on plan assets	(8,534)		(10,211)		(1,517)		(2,091)
Amortization:
Prior service cost (credit)	76		87		(58)		(115)
Recognized actuarial loss	—		1,931		816		803
Transition obligation	—		—		—		1
Net periodic (income) expense	(1,948)		(107)		2,027		1,553
Less: Discontinued operations	—		677		—		174
Net periodic (income) expense - Continuing operations	$	(1,948)	$	(784)	$	2,027	$	1,379

Supplemental Employee Retirement Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

Non-Qualified Supplemental Benefits

	Three Months Ended March 31,
	2019		2018
Service cost	$	486	$	695
Interest cost	668		893
Amortization:
Prior service cost	703		963
Recognized actuarial gain	(570)		(255)
Net periodic expense	$	1,287	$	2,296
Less: Discontinued operations	—		254
Net periodic expense - Continuing operations	$	1,287	$	2,042

Post-Retirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Defined Benefit Plans Disclosures

Post-Retirement Benefit Plans

The Company also maintains post-retirement benefit plans, although these plans are closed to new entrants. The supplemental and post-retirement benefit plans are supported by the general assets of the Company. The following table sets forth the components of the Company’s net periodic expense relating to its post-retirement benefit plans:

	Three Months Ended March 31,
	2019		2018
Service cost	$	5	$	8
Interest cost	78		73
Amortization:
Prior service cost	3		3
Recognized actuarial gain	(18)		(8)
Net periodic expense	$	68	$	76