Pensions (Tables)

3 Months Ended

Mar. 31, 2019

Pensions [Abstract]

Components of Net Periodic Pension Cost

Components of Net Periodic Pension Cost

	Three Months Ended March 31
	2019			2018
Service cost	$	212		$	254
Interest cost		411			379
Expected return on plan assets		(683	)		(698	)
Amortization of actuarial loss		105			101
Amortization of prior service credit		(3	)		(3	)
Rate-regulated adjustment		533			542
Net periodic pension expense	$	575		$	575