Revenues (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022								Year ended December 31, 2021
(in thousands)	Electric  utility		Bank		Other		Total		Electric  utility		Bank		Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	1,078,372	$	—	$	—	$	1,078,372	$	830,653	$	—	$	—	$	830,653
Electric energy sales - commercial	1,087,485		—		—		1,087,485		791,424		—		—		791,424
Electric energy sales - large light and power	1,221,608		—		—		1,221,608		837,834		—		—		837,834
Electric energy sales - other	17,063		—		—		17,063		10,770		—		—		10,770
Bank fees	—		48,883		—		48,883		—		46,658		—		46,658
Other sales	—		—		11,804		11,804		—		—		4,086		4,086
Total revenues from contracts with customers	3,404,528		48,883		11,804		3,465,215		2,470,681		46,658		4,086		2,521,425
Revenues from other sources
Regulatory revenue	(29,124)		—		—		(29,124)		40,069		—		—		40,069
Bank interest and dividend income	—		265,874		—		265,874		—		242,266		—		242,266
Other bank noninterest income	—		6,311		—		6,311		—		17,474		—		17,474
Other	33,183		—		526		33,709		28,886		—		259		29,145
Total revenues from other sources	4,059		272,185		526		276,770		68,955		259,740		259		328,954
Total revenues	$	3,408,587	$	321,068	$	12,330	$	3,741,985	$	2,539,636	$	306,398	$	4,345	$	2,850,379
Timing of revenue recognition
Services/goods transferred at a point in time	$	—	$	48,883	$	—	$	48,883	$	—	$	46,658	$	—	$	46,658
Services/goods transferred over time	3,404,528		—		11,804		3,416,332		2,470,681		—		4,086		2,474,767
Total revenues from contracts with customers	$	3,404,528	$	48,883	$	11,804	$	3,465,215	$	2,470,681	$	46,658	$	4,086	$	2,521,425