Summary Of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive loss, net of tax, consisted of the following as of March 31, 2015 and December 31, 2014 (dollars in thousands):

	March 31,			December 31,
	2015			2014
Unfunded benefit obligation for pensions and other postretirement benefit plans - net of taxes of $(4,115) and $(4,247), respectively	$	(7,642	)	$	(7,888	)

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). Items in parenthesis indicate reductions to net income.

	Amounts Reclassified from Accumulated Other Comprehensive Loss
Details about Accumulated Other Comprehensive Loss Components	2015			2014			Affected Line Item in Statement of Income
Realized gains on investment securities	$	—		$	3		(a)
	—			3			Total before tax
	—			(1		)	Tax expense (a)
	$	—		$	2		Net of tax
Amortization of defined benefit pension items
Amortization of net prior service cost	$	273		$	38		(b)
Amortization of net loss	(3,688		)	(1,990		)	(b)
Adjustment due to effects of regulation	3,037			1,782			(b)
	(378		)	(170		)	Total before tax
	132			59			Tax benefit
	$	(246	)	$	(111	)	Net of tax

(a) These amounts were included as part of net income from discontinued operations (see Note 4 for additional details).

(b) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (see Note 6 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 and totaled the following amounts for the three months ended March 31 (dollars in thousands):

	2015		2014
Utility taxes	$	19,498	$	19,738

Other Income - Net

Other income-net consisted of the following items for the three months ended March 31 (dollars in thousands):

	2015			2014
Interest income	$	243		$	274
Interest income on regulatory deferrals	20			44
Equity-related AFUDC	2,215			2,034
Net loss on investments	(384		)	(40		)
Other income	137			288
Total	$	2,231		$	2,600

Materials And Supplies Fuel Stock And Natural Gas Stored

Inventories of materials and supplies, fuel stock and natural gas stored are recorded at average cost for our regulated operations and the lower of cost or market for our non-regulated operations and consisted of the following as of March 31, 2015 and December 31, 2014 (dollars in thousands):

	March 31,		December 31,
	2015		2014
Materials and supplies	$	33,271	$	32,483
Fuel stock	5,508		5,142
Natural gas stored	5,006		28,731
Total	$	43,785	$	66,356

Disposition of Available-for-Sale Securities

The following is a summary of the disposition of available-for-sale securities for the three months ended March 31, 2014 (dollars in thousands):

	2014
Proceeds from sales, maturities and calls	$	11,403
Gross realized gains	3