Revenues (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

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

	Three months ended March 31, 2020
(in thousands)	Electric  utility		Bank		Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	190,266	$	—	$	—	$	190,266
Electric energy sales - commercial	197,105		—		—		197,105
Electric energy sales - large light and power	216,220		—		—		216,220
Electric energy sales - other	3,458		—		—		3,458
Bank fees	—		11,556		—		11,556
Total revenues from contracts with customers	607,049		11,556		—		618,605
Revenues from other sources
Regulatory revenue	(15,304)		—		—		(15,304)
Bank interest and dividend income	—		64,975		—		64,975
Other bank noninterest income	—		3,207		—		3,207
Other	5,697		—		6		5,703
Total revenues from other sources	(9,607)		68,182		6		58,581
Total revenues	$	597,442	$	79,738	$	6	$	677,186
Timing of revenue recognition
Services/goods transferred at a point in time	$	—	$	11,556	$	—	$	11,556
Services/goods transferred over time	607,049		—		—		607,049
Total revenues from contracts with customers	$	607,049	$	11,556	$	—	$	618,605

	Three months ended March 31, 2019
(in thousands)	Electric  utility		Bank		Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	175,745	$	—	$	—	$	175,745
Electric energy sales - commercial	187,408		—		—		187,408
Electric energy sales - large light and power	198,926		—		—		198,926
Electric energy sales - other	4,078		—		—		4,078
Bank fees	—		11,233		—		11,233
Total revenues from contracts with customers	566,157		11,233		—		577,390
Revenues from other sources
Regulatory revenue	6,207		—		—		6,207
Bank interest and dividend income	—		68,488		—		68,488
Other bank noninterest income	—		3,331		—		3,331
Other	6,131		—		68		6,199
Total revenues from other sources	12,338		71,819		68		84,225
Total revenues	$	578,495	$	83,052	$	68	$	661,615
Timing of revenue recognition
Services/goods transferred at a point in time	$	—	$	11,233	$	—	$	11,233
Services/goods transferred over time	566,157		—		—		566,157
Total revenues from contracts with customers	$	566,157	$	11,233	$	—	$	577,390