Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2019

Accumulated Other Comprehensive Loss [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated other comprehensive loss, net of tax, consisted of the following as of March 31, 2019 and December 31, 2018 (dollars in thousands):

	March 31,		December 31,
	2019		2018
Unfunded benefit obligation for pensions and other postretirement benefit plans - net of taxes of $2,048 and $2,091, respectively	$	7,706	$	7,866

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

The following table details the reclassifications out of accumulated other comprehensive loss to net income by component for the three months ended March 31 (dollars in thousands).

	Amounts Reclassified from Accumulated Other Comprehensive Loss
Details about Accumulated Other Comprehensive Loss Components	2019			2018			Affected Line Item in Statement of Income
Amortization of defined benefit pension items
Amortization of net prior service cost	$	(200	)	$	(228	)	(a)
Amortization of net loss	3,661			2,995			(a)
Adjustment due to effects of regulation	(3,258		)	(2,508		)	(a)
	203			259			Total before tax
	(43		)	(55		)	Tax expense
	$	160		$	204		Net of tax

(a) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 7 for additional details).