Income Tax (tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Dollars in thousands	2013			2012			2011
Income taxes at federal statutory rate	$	35,785		$	35,764		$	37,056
Increase (decrease):
Current state income tax, net of federal tax benefit	4,674			4,773			4,945
Amortization of investment and energy tax credits	(271		)	(350		)	(442		)
Differences required to be flowed-through by regulatory commissions	2,357			1,718			1,647
Gains on company and trust-owned life insurance	(864		)	(800		)	(786		)
Regulatory asset impairment	—			2,700			—
Other, net	24			(402		)	405
Total provision for income taxes	$	41,705		$	43,403		$	42,825
Effective tax rate	40.8		%	42.5		%	40.5		%

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

In thousands	2013			2012		2011
Current
Federal	$	(62	)	$	1,693	$	130
State	(11		)	99		(929		)
	(73		)	1,792		(799		)
Deferred
Federal	35,109			31,187		35,021
State	6,669			10,424		8,603
	41,778			41,611		43,624
Total provision for income taxes	$	41,705		$	43,403	$	42,825
Total income taxes paid	$	870		$	2,979	$	1,756

Schedule Of Regulated Utility And Non Utility Business Segments [Table Text Block]

In thousands	2013			2012			2011
Utility:
Current	$	(73	)	$	1,909		$	(4,646	)
Deferred	38,073			39,163			49,595
Deferred investment and energy tax credits	(271		)	(350		)	(422		)
	37,729			40,722			44,527
Non-utility business segments:
Current	—			(117		)	3,846
Deferred	3,976			2,798			(5,548		)
	3,976			2,681			(1,702		)
Total provision for income taxes	$	41,705		$	43,403		$	42,825

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

In thousands	2013		2012
Deferred tax liabilities:
Plant and property	$	362,160	$	322,527
Regulatory income tax assets	56,183		60,253
Regulatory liabilities	71,971		49,197
Non-regulated deferred tax liabilities	47,516		43,824
Total	$	537,830	$	475,801
Deferred tax assets:
Regulatory assets	$	—	$	(7,724	)
Unfunded pension and postretirement obligations	4,112		6,024
Non-regulated deferred tax assets	—		(1,235		)
Alternative minimum tax credit carryforward	1,939		1,986
Loss and credit carryforwards	45,351		32,997
Total	51,402		32,048
Deferred income tax liabilities, net	486,428		443,753
Deferred investment tax credits	367		624
Deferred income taxes and investment tax credits	$	486,795	$	444,377