Segment Information (Tables)

3 Months Ended

Mar. 31, 2017

Segment Information [Abstract]

Company's Segment Information, Continuing Operations

	Three Months Ended						Three Months Ended
	March 31, 2017						March 31, 2016
	Regulated		Other		Consolidated		Regulated		Other		Consolidated
Operating revenues	$	186,349	$	1,438	$	187,787	$	186,006	$	6,601	$	192,607
Operations and maintenance expense		67,510		1,618		69,128		67,325		6,216		73,541
Depreciation		33,666		171		33,837		32,206		(61)		32,145
Operating income (loss)		71,067		(1,171)		69,896		72,850		(519)		72,331
Interest expense, net		19,777		1,549		21,326		18,801		1,052		19,853
Allowance for funds used during construction		3,193		-		3,193		2,308		-		2,308
Income tax expense (benefit)		3,856		(926)		2,930		3,673		(666)		3,007
Net income (loss)		50,896		(1,824)		49,072		52,894		(1,157)		51,737
Capital expenditures		94,409		153		94,562		72,389		595		72,984

Company's Segment Information, Assets

	March 31,		December 31,
	2017		2016
Total assets:
Regulated	$	6,024,765	$	5,953,702
Other		210,830		205,289
Consolidated	$	6,235,595	$	6,158,991