Revenues (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

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

Three months ended March 31, 2018	Electric utility		Bank		Other		Total
(in thousands)
Revenues from contracts with customers
Electric energy sales - residential	$	178,589	$	—	$	—	$	178,589
Electric energy sales - commercial	188,998		—		—		188,998
Electric energy sales - large light and power	192,321		—		—		192,321
Electric energy sales - other	3,263		—		—		3,263
Utility fees	797		—		—		797
Bank fees	—		11,497		—		11,497
Total revenues from contracts with customers	563,968		11,497		—		575,465
Revenues from other sources
Regulatory revenue	4,750		—		—		4,750
Bank interest and dividend income	—		62,002		—		62,002
Other bank noninterest income	—		1,920		—		1,920
Other	1,709		—		28		1,737
Total revenues from other sources	6,459		63,922		28		70,409
Total revenues	$	570,427	$	75,419	$	28	$	645,874
Timing of revenue recognition
Services/goods transferred at a point in time	$	797	$	11,497	$	—	$	12,294
Services/goods transferred over time	563,171		—		—		563,171
Total revenues from contracts with customers	$	563,968	$	11,497	$	—	$	575,465