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Revenues (Tables)
6 Months Ended
Jun. 30, 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 June 30, 2021Six months ended June 30, 2021
(in thousands) Electric  utilityBankOtherTotalElectric  utilityBankOtherTotal
Revenues from contracts with customers
Electric energy sales - residential
$196,318 $— $— $196,318 $377,557 $— $— $377,557 
Electric energy sales - commercial
192,103 — — 192,103 360,568 — — 360,568 
Electric energy sales - large light and power
201,536 — — 201,536 378,351 — — 378,351 
Electric energy sales - other 2,212 — — 2,212 4,691 — — 4,691 
Bank fees— 11,569 — 11,569 — 22,947 — 22,947 
Other sales— — 1,089 1,089 — — 2,013 2,013 
Total revenues from contracts with customers592,169 11,569 1,089 604,827 1,121,167 22,947 2,013 1,146,127 
Revenues from other sources
Regulatory revenue$2,854 $— $— $2,854 $31,283 $— $— $31,283 
Bank interest and dividend income
— 62,066 — 62,066 — 120,686 — 120,686 
Other bank noninterest income— 3,625 — 3,625 — 10,758 — 10,758 
Other6,856 — 29 6,885 14,293 — 56 14,349 
Total revenues from other sources9,710 65,691 29 75,430 45,576 131,444 56 177,076 
Total revenues$601,879 $77,260 $1,118 $680,257 $1,166,743 $154,391 $2,069 $1,323,203 
Timing of revenue recognition
Services/goods transferred at a point in time
$— $11,569 $— $11,569 $— $22,947 $— $22,947 
Services/goods transferred over time
592,169 — 1,089 593,258 1,121,167 — 2,013 1,123,180 
Total revenues from contracts with customers$592,169 $11,569 $1,089 $604,827 $1,121,167 $22,947 $2,013 $1,146,127 
Three months ended June 30, 2020Six months ended June 30, 2020
(in thousands) Electric  utilityBankOtherTotalElectric  utilityBankOtherTotal
Revenues from contracts with customers
Electric energy sales - residential
$187,590 $— $— $187,590 $377,856 $— $— $377,856 
Electric energy sales - commercial
159,874 — — 159,874 356,979 — — 356,979 
Electric energy sales - large light and power
176,467 — — 176,467 392,687 — — 392,687 
Electric energy sales - other1,779 — — 1,779 5,237 — — 5,237 
Bank fees— 7,211 — 7,211 — 18,767 — 18,767 
Total revenues from contracts with customers525,710 7,211 — 532,921 1,132,759 18,767 — 1,151,526 
Revenues from other sources
Regulatory revenue2,826 — — 2,826 (12,478)— — (12,478)
Bank interest and dividend income
— 59,829 — 59,829 — 124,804 — 124,804 
Other bank noninterest income— 7,674 — 7,674 — 10,881 — 10,881 
Other5,679 — 16 5,695 11,376 — 22 11,398 
Total revenues from other sources8,505 67,503 16 76,024 (1,102)135,685 22 134,605 
Total revenues$534,215 $74,714 $16 $608,945 $1,131,657 $154,452 $22 $1,286,131 
Timing of revenue recognition
Services/goods transferred at a point in time
$— $7,211 $— $7,211 $— $18,767 $— $18,767 
Services/goods transferred over time
525,710 — — 525,710 1,132,759 — — 1,132,759 
Total revenues from contracts with customers$525,710 $7,211 $— $532,921 $1,132,759 $18,767 $— $1,151,526