Components of Net Periodic Benefit Cost (Tables)

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

	Three Months Ended March 31,
	(000's)
	Pension Benefits						Post-Retirement Health Benefits
	2020			2019			2020		2019
Service cost	$	325		$	304		$	10	$	9
Interest cost	779			866			31		36
Expected return on plan assets	(1,050		)	(896		)	—		—
Net amortization of prior service cost	—			—			—		—
Net amortization of net (gain) loss	492			389			—		(4		)
Net Periodic Benefit Cost	$	546		$	663		$	41	$	41