Revenues (Tables)

12 Months Ended

Dec. 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:

	Year ended December 31, 2021								Year ended December 31, 2020
(in thousands)	Electric  utility		Bank		Other		Total		Electric  utility		Bank		Other		Total
Revenues from contracts with customers
Electric energy sales - residential	$	830,653	$	—	$	—	$	830,653	$	766,609	$	—	$	—	$	766,609
Electric energy sales - commercial	791,424		—		—		791,424		703,516		—		—		703,516
Electric energy sales - large light and power	837,834		—		—		837,834		751,464		—		—		751,464
Electric energy sales - other	10,770		—		—		10,770		8,054		—		—		8,054
Bank fees	—		46,658		—		46,658		—		38,887		—		38,887
Other sales	—		—		4,086		4,086		—		—		921		921
Total revenues from contracts with customers	2,470,681		46,658		4,086		2,521,425		2,229,643		38,887		921		2,269,451
Revenues from other sources
Regulatory revenue	40,069		—		—		40,069		11,869		—		—		11,869
Bank interest and dividend income	—		242,266		—		242,266		—		244,663		—		244,663
Other bank noninterest income	—		17,474		—		17,474		—		29,961		—		29,961
Other	28,886		—		259		29,145		23,808		—		23		23,831
Total revenues from other sources	68,955		259,740		259		328,954		35,677		274,624		23		310,324
Total revenues	$	2,539,636	$	306,398	$	4,345	$	2,850,379	$	2,265,320	$	313,511	$	944	$	2,579,775
Timing of revenue recognition
Services/goods transferred at a point in time	$	—	$	46,658	$	—	$	46,658	$	—	$	38,887	$	—	$	38,887
Services/goods transferred over time	2,470,681		—		4,086		2,474,767		2,229,643		—		921		2,230,564
Total revenues from contracts with customers	$	2,470,681	$	46,658	$	4,086	$	2,521,425	$	2,229,643	$	38,887	$	921	$	2,269,451