Revenues (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

The following tables disaggregate revenues by major source, timing of revenue recognition, and segment:

	Year ended December 31, 2018
(in thousands)	Electric  utility			Bank		Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	801,846		$	—	$	—	$	801,846
Electric energy sales - commercial	853,672			—		—		853,672
Electric energy sales - large light and power	894,770			—		—		894,770
Electric energy sales - other	17,243			—		—		17,243
Bank fees	—			47,300		—		47,300
Total revenues from contracts with customers	2,567,531			47,300		—		2,614,831
Revenues from other sources
Regulatory revenue	(37,687		)	—		—		(37,687		)
Bank interest and dividend income	—			258,225		—		258,225
Other bank noninterest income	—			8,750		—		8,750
Other	16,681			—		49		16,730
Total revenues from other sources	(21,006		)	266,975		49		246,018
Total revenues	$	2,546,525		$	314,275	$	49	$	2,860,849
Timing of revenue recognition
Services/goods transferred at a point in time	$	—		$	47,300	$	—	$	47,300
Services/goods transferred over time	2,567,531			—		—		2,567,531
Total revenues from contracts with customers	$	2,567,531		$	47,300	$	—	$	2,614,831