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Revenues (Tables)
9 Months Ended
Sep. 30, 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 September 30, 2020Nine months ended September 30, 2020
(in thousands) Electric  utilityBankOtherTotalElectric  utilityBankOtherTotal
Revenues from contracts with customers
Electric energy sales - residential
$191,321 $— $— $191,321 $569,177 $— $— $569,177 
Electric energy sales - commercial
171,156 — — 171,156 528,135 — — 528,135 
Electric energy sales - large light and power
176,200 — — 176,200 568,887 — — 568,887 
Electric energy sales - other 1,935 — — 1,935 7,172 — — 7,172 
Bank fees— 9,589 — 9,589 — 28,356 — 28,356 
Solar energy sales— — 211 211 — — 240 240 
Total revenues from contracts with customers540,612 9,589 211 550,412 1,673,371 28,356 240 1,701,967 
Revenues from other sources
Regulatory revenue15,457 — — 15,457 2,979 — — 2,979 
Bank interest and dividend income
— 59,640 — 59,640 — 184,444 — 184,444 
Other bank noninterest income— 9,415 — 9,415 — 20,296 — 20,296 
Other6,499 — 6,503 17,875 — (3)17,872 
Total revenues from other sources21,956 69,055 91,015 20,854 204,740 (3)225,591 
Total revenues$562,568 $78,644 $215 $641,427 $1,694,225 $233,096 $237 $1,927,558 
Timing of revenue recognition
Services/goods transferred at a point in time
$— $9,589 $— $9,589 $— $28,356 $— $28,356 
Services/goods transferred over time
540,612 — 211 540,823 1,673,371 — 240 1,673,611 
Total revenues from contracts with customers$540,612 $9,589 $211 $550,412 $1,673,371 $28,356 $240 $1,701,967 


Three months ended September 30, 2019Nine months ended September 30, 2019
(in thousands) Electric  utilityBankOtherTotalElectric  utilityBankOtherTotal
Revenues from contracts with customers
Electric energy sales - residential
$230,051 $— $— $230,051 $601,664 $— $— $601,664 
Electric energy sales - commercial
230,411 — — 230,411 635,097 — — 635,097 
Electric energy sales - large light and power
248,457 — — 248,457 679,252 — — 679,252 
Electric energy sales - other4,081 — — 4,081 11,933 — — 11,933 
Bank fees— 12,111 — 12,111 — 34,976 — 34,976 
Total revenues from contracts with customers713,000 12,111 — 725,111 1,927,946 34,976 — 1,962,922 
Revenues from other sources
Regulatory revenue(30,800)— — (30,800)(44,953)— — (44,953)
Bank interest and dividend income
— 66,859 — 66,859 — 201,502 — 201,502 
Other bank noninterest income— 3,578 — 3,578 — 10,809 — 10,809 
Other6,130 — 6,134 17,616 — 86 17,702 
Total revenues from other sources(24,670)70,437 45,771 (27,337)212,311 86 185,060 
Total revenues$688,330 $82,548 $$770,882 $1,900,609 $247,287 $86 $2,147,982 
Timing of revenue recognition
Services/goods transferred at a point in time
$— $12,111 $— $12,111 $— $34,976 $— $34,976 
Services/goods transferred over time
713,000 — — 713,000 1,927,946 — — 1,927,946 
Total revenues from contracts with customers$713,000 $12,111 $— $725,111 $1,927,946 $34,976 $— $1,962,922