Segment Information Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The following table presents information about our reportable segments.

	For the Year Ended December 31,
	2016			2015		2014
(in thousands)
Operating Revenues, Unaffiliated Customers
Regulated Energy	$	302,402		$	300,674	$	299,345
Unregulated Energy	196,458			158,570		184,557
Other businesses and eliminations	—			—		14,932
Total operating revenues, unaffiliated customers	$	498,860		$	459,244	$	498,834
Intersegment Revenues(1)
Regulated Energy	$	3,287		$	1,228	$	1,097
Unregulated Energy	7,321			3,537		404
Other businesses	880			880		979
Total intersegment revenues	$	11,488		$	5,645	$	2,480
Operating Income
Regulated Energy	$	69,851		$	60,985	$	50,451
Unregulated Energy	13,844			16,355		11,723
Other businesses and eliminations	401			418		105
Operating Income	84,096			77,758		62,279
Gains from sales of businesses	—			—		7,139
Other (expense) income	(441		)	293		101
Interest charges	10,639			10,006		9,482
Income Before Income taxes	73,016			68,045		60,037
Income taxes	28,341			26,905		23,945
Net Income	$	44,675		$	41,140	$	36,092
Depreciation and Amortization
Regulated Energy	$	25,677		$	24,195	$	21,915
Unregulated Energy	6,386			5,679		3,994
Other businesses and eliminations	96			98		407
Total depreciation and amortization	$	32,159		$	29,972	$	26,316
Capital Expenditures
Regulated Energy	$	139,994		$	98,372	$	84,959
Unregulated Energy	23,984			38,347		9,648
Other businesses	5,398			5,994		3,450
Total capital expenditures	$	169,376		$	142,713	$	98,057

⁽¹⁾ All significant intersegment revenues are billed at market rates and have been eliminated from consolidated revenues.

	As of December 31,
	2016		2015
Identifiable Assets
Regulated Energy	$	986,752	$	872,065
Unregulated Energy	226,368		171,840
Other businesses	16,099		23,516
Total identifiable assets	$	1,229,219	$	1,067,421