Pensions (Tables)

3 Months Ended

Mar. 31, 2020

Pensions [Abstract]

Components of Net Periodic Pension Cost

Components of Net Periodic Pension Cost

	Three Months Ended March 31
	2020			2019
Service cost	$	$234		$	$212
Interest cost		364			411
Expected return on plan assets		(799	)		(683	)
Amortization of actuarial loss		92			105
Amortization of prior service credit		(3	)		(3	)
Rate-regulated adjustment		687			533
Net periodic pension expense	$	$575		$	$575