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Business segment data (Tables)
9 Months Ended
Sep. 30, 2022
Segment Reporting [Abstract]  
Information on the Company's businesses Information on the Company's segments was as follows:
Three Months EndedNine Months Ended
September 30,September 30,
 2022 2021 2022 2021 
 (In thousands)
External operating revenues:   
Regulated operations:
Electric$99,193 $98,930 $278,249 $267,254 
Natural gas distribution132,074 110,378 792,932 614,373 
Pipeline32,347 27,757 69,347 58,390 
 263,614 237,065 1,140,528 940,017 
Three Months EndedNine Months Ended
September 30,September 30,
 2022 2021 2022 2021 
 (In thousands)
Non-regulated operations:
Pipeline3,698 3,211 7,630 10,263 
Construction materials and contracting975,085 831,189 1,996,533 1,730,521 
Construction services734,809 514,523 1,969,995 1,556,737 
Other— 25 — 70 
 1,713,592 1,348,948 3,974,158 3,297,591 
Total external operating revenues$1,977,206 $1,586,013 $5,114,686 $4,237,608 
Intersegment operating revenues:    
Regulated operations:
Electric$124 $136 $371 $407 
Natural gas distribution139 142 416 425 
Pipeline3,508 3,845 36,845 37,530 
3,771 4,123 37,632 38,362 
Non-regulated operations:
Pipeline87 63 483 470 
Construction materials and contracting343 110 674 314 
Construction services2,229 289 5,090 2,128 
Other4,438 3,398 13,168 10,082 
7,097 3,860 19,415 12,994 
Intersegment eliminations(10,868)(7,983)(57,047)(51,356)
Total intersegment operating revenues$— $— $— $— 
Operating income (loss):
Electric$30,395 $27,310 $53,764 $53,982 
Natural gas distribution(16,688)(14,249)38,929 42,925 
Pipeline14,963 12,284 39,447 35,896 
Construction materials and contracting147,367 133,712 157,116 171,274 
Construction services34,949 30,120 110,588 108,172 
Other(1,135)(8)(2,081)(226)
Total operating income$209,851 $189,169 $397,763 $412,023 
Net income (loss):
Regulated operations:
Electric$21,596 $20,564 $37,476 $41,618 
Natural gas distribution(18,058)(15,390)10,758 20,081 
Pipeline9,379 10,225 24,527 27,508 
12,917 15,399 72,761 89,207 
Non-regulated operations:
Pipeline492 356 (187)1,166 
Construction materials and contracting102,764 96,282 95,337 116,865 
Construction services27,977 23,130 83,755 81,839 
Other3,783 3,795 (1,368)2,172 
135,016 123,563 177,537 202,042 
Income from continuing operations147,933 138,962 250,298 291,249 
Discontinued operations, net of tax38 314 103 348 
Net income$147,971 $139,276 $250,401 $291,597