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Revenues (Tables)
6 Months Ended
Jun. 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 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 - other 1,779  —  —  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  


Three months ended June 30, 2019Six months ended June 30, 2019
(in thousands) Electric  utilityBankOtherTotalElectric  utilityBankOtherTotal
Revenues from contracts with customers
Electric energy sales - residential
$195,868  $—  $—  $195,868  $371,613  $—  $—  $371,613  
Electric energy sales - commercial
217,278  —  —  217,278  404,686  —  —  404,686  
Electric energy sales - large light and power
231,869  —  —  231,869  430,795  —  —  430,795  
Electric energy sales - other3,774  —  —  3,774  7,852  —  —  7,852  
Bank fees—  11,632  —  11,632  —  22,865  —  22,865  
Total revenues from contracts with customers648,789  11,632  —  660,421  1,214,946  22,865  —  1,237,811  
Revenues from other sources
Regulatory revenue(20,360) —  —  (20,360) (14,153) —  —  (14,153) 
Bank interest and dividend income
—  66,155  —  66,155  —  134,643  —  134,643  
Other bank noninterest income—  3,900  —  3,900  —  7,231  —  7,231  
Other5,355  —  14  5,369  11,486  —  82  11,568  
Total revenues from other sources(15,005) 70,055  14  55,064  (2,667) 141,874  82  139,289  
Total revenues$633,784  $81,687  $14  $715,485  $1,212,279  $164,739  $82  $1,377,100  
Timing of revenue recognition
Services/goods transferred at a point in time
$—  $11,632  $—  $11,632  $—  $22,865  $—  $22,865  
Services/goods transferred over time
648,789  —  —  648,789  1,214,946  —  —  1,214,946  
Total revenues from contracts with customers$648,789  $11,632  $—  $660,421  $1,214,946  $22,865  $—  $1,237,811