Segment Information

3 Months Ended

Mar. 31, 2019

Segment Reporting Information [Line Items]

Segment Reporting Disclosure [Text Block]

Segment Information

Our reportable business segments are primarily engaged in the electric and natural gas business. The remainder of our operations are presented as other, which primarily consists of unallocated corporate costs and unregulated activity.

We evaluate the performance of these segments based on gross margin. The accounting policies of the operating segments are the same as the parent except that the parent allocates some of its operating expenses to the operating segments according to a methodology designed by management for internal reporting purposes and involves estimates and assumptions.

Financial data for the business segments are as follows (in thousands):

Three Months Ended
March 31, 2019	Electric			Gas			Other			Eliminations		Total
Operating revenues	$	273,037		$	111,183		$	—		$	—	$	384,220
Cost of sales	76,994			38,741			—			—		115,735
Gross margin	196,043			72,442			—			—		268,485
Operating, general and administrative	57,783			21,008			2,301			—		81,092
Property and other taxes	35,047			9,740			2			—		44,789
Depreciation and depletion	38,051			7,533			—			—		45,584
Operating income (loss)	65,162			34,161			(2,303		)	—		97,020
Interest expense	(19,535		)	(1,510		)	(2,745		)	—		(23,790		)
Other (expense) income	(561		)	(477		)	2,187			—		1,149
Income tax (expense) benefit	(1,809		)	1,079			(843		)	—		(1,573		)
Net income (loss)	$	43,257		$	33,253		$	(3,704	)	$	—	$	72,806
Total assets	$	4,544,043		$	1,151,929		$	4,683		$	—	$	5,700,655
Capital expenditures	$	52,307		$	13,270		$	—		$	—	$	65,577

Three Months Ended
March 31, 2018	Electric			Gas			Other			Eliminations		Total
Operating revenues	$	238,342		$	103,160		$	—		$	—	$	341,502
Cost of sales	57,273			38,804			—			—		96,077
Gross margin	181,069			64,356			—			—		245,425
Operating, general and administrative	54,648			21,219			(1,522		)	—		74,345
Property and other taxes	33,493			9,318			2			—		42,813
Depreciation and depletion	36,153			7,594			8			—		43,755
Operating income	56,775			26,225			1,512			—		84,512
Interest expense	(19,520		)	(1,854		)	(1,596		)	—		(22,970		)
Other income (expense)	490			108			(1,727		)	—		(1,129		)
Income tax (expense) benefit	(498		)	(2,226		)	810			—		(1,914		)
Net income (loss)	$	37,247		$	22,253		$	(1,001	)	$	—	$	58,499
Total assets	$	4,319,798		$	1,065,103		$	15,517		$	—	$	5,400,418
Capital expenditures	$	42,898		$	9,107		$	—		$	—	$	52,005