Business Segment Data (Tables)

12 Months Ended

Dec. 31, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

	(Thousands of Dollars)
	Years Ended December 31,
Operations by Segments:	2016			2015			2014
Revenues:
Regulated	$	118,017		$	111,247		$	103,556
Non – Regulated		15,388			15,238			14,143
Inter-segment Elimination		(499	)		(460	)		(560	)
Consolidated Revenues	$	132.906		$	126,025		$	117,139
Operating Income:
Regulated	$	38,201		$	33,603		$	32,000
Non – Regulated		2,431			2,237			2,392
Consolidated Operating Income	$	40,632		$	35,840		$	34,392
Depreciation:
Regulated	$	12,606		$	11,874		$	11,262
Non – Regulated		190			177			182
Consolidated Depreciation	$	12,796		$	12,051		$	11,444
Other Income (Expense), Net:
Regulated	$	779		$	619		$	157
Non – Regulated		(1,308	)		20			(75	)
Inter-segment Elimination		(333	)		(346	)		(485	)
Consolidated Other Income (Expense), Net	$	(862	)	$	293		$	(403	)
Interest Expense:
Regulated	$	5,293		$	5,554		$	5,607
Non – Regulated		89			89			91
Inter-segment Elimination		(89	)		(89	)		(91	)
Consolidated Interest Charges	$	5,293		$	5,554		$	5,607
Income Taxes:
Regulated	$	11,091		$	9,522		$	8,907
Non – Regulated		644			1,029			1,030
Consolidated Income Taxes	$	11,735		$	10,551		$	9,937
Net Income:
Regulated	$	22,353		$	18,889		$	17,249
Non – Regulated		389			1,139			1,196
Consolidated Net Income	$	22,742		$	20,028		$	18,445
Capital Expenditures:
Regulated	$	47,189		$	25,706		$	22,498
Non – Regulated		186			67			98
Total Capital Expenditures	$	47,375		$	25, 773		$	22,596

	(Thousands of Dollars)
	As of December 31, 2016			As of December 31, 2015
Assets:
Regulated	$	619,915		$	581,321
Non – Regulated		6,245			6,436
Inter-segment Elimination		(5,999	)		(6,374	)
Consolidated Assets	$	620,161		$	581,383