Revenues (Tables)

3 Months Ended

Mar. 31, 2021

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, 2021
(in thousands)	Electric utility		Bank		Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	181,239	$	—	$	—	$	181,239
Electric energy sales - commercial	168,465		—		—		168,465
Electric energy sales - large light and power	176,815		—		—		176,815
Electric energy sales - other	2,479		—		—		2,479
Bank fees	—		11,378		—		11,378
Other sales	—		—		924		924
Total revenues from contracts with customers	528,998		11,378		924		541,300
Revenues from other sources
Regulatory revenue	$	28,429	$	—	$	—	$	28,429
Bank interest and dividend income	—		58,620		—		58,620
Other bank noninterest income	—		7,133		—		7,133
Other	7,437		—		27		7,464
Total revenues from other sources	35,866		65,753		27		101,646
Total revenues	$	564,864	$	77,131	$	951	$	642,946
Timing of revenue recognition
Services/goods transferred at a point in time	$	—	$	11,378	$	—	$	11,378
Services/goods transferred over time	528,998		—		924		529,922
Total revenues from contracts with customers	$	528,998	$	11,378	$	924	$	541,300

	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