Summary Of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss, net of tax, consisted of the following as of March 31, 2017 and December 31, 2016 (dollars in thousands):

	March 31,		December 31,
	2017		2016
Unfunded benefit obligation for pensions and other postretirement benefit plans - net of taxes of $3,977 and $4,075, respectively	$	7,385	$	7,568

Reclassifications Out of Accumulated Other Comprehensive Loss by Component

The following table details the reclassifications out of accumulated other comprehensive loss 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	2017			2016			Affected Line Item in Statement of Income
Amortization of defined benefit pension items
Amortization of net prior service cost	$	(299	)	$	(311	)	(a)
Amortization of net loss	3,638			3,642			(a)
Adjustment due to effects of regulation	(3,058		)	(5,223		)	(a) (b)
	281			(1,892		)	Total before tax
	(98		)	663			Tax benefit (expense)
	$	183		$	(1,229	)	Net of tax

(a) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 4 for additional details).

Utility Taxes

Utility related taxes collected from customers (primarily state excise taxes and city utility taxes) are recorded as operating revenue and expense. Taxes other than income taxes consisted of the following items for the three months ended March 31 (dollars in thousands):

	2017		2016
Utility related taxes	$	21,584	$	18,365
Property taxes	10,406		10,420
Other taxes	672		600
Total	$	32,662	$	29,385

Materials And Supplies Fuel Stock And Natural Gas Stored

Inventories of materials and supplies, fuel stock and stored natural gas are recorded at average cost for our regulated operations and the lower of cost or net realizable value for our non-regulated operations and consisted of the following as of March 31, 2017 and December 31, 2016 (dollars in thousands):

	March 31,		December 31,
	2017		2016
Materials and supplies	$	42,198	$	40,700
Fuel stock	4,277		4,585
Stored natural gas	709		8,029
Total	$	47,184	$	53,314