XML 108 R92.htm IDEA: XBRL DOCUMENT v3.10.0.1
Business Segments (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
segment
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Details of reportable segment                        
Operating revenues   $ 111,005 $ 124,182 $ 106,901 $ 94,728 $ 104,180 $ 124,418 $ 113,195 $ 98,810 $ 436,816 $ 440,603 $ 436,087
Operating income (loss)   22,749 33,975 25,568 18,691 21,959 38,534 42,026 24,576 100,983 127,095 114,192
Interest expense, net                   (19,855) (20,792) (21,235)
Net utility plant   1,296,310       1,204,992       1,296,310 1,204,992 1,150,926
Depreciation and amortization expense [1]                   40,425 39,031 38,850
Income tax expense/(benefit)                   18,017 38,974 34,735
Capital additions                   $ 126,561 113,126 129,867
Parent Company                        
Details of reportable segment                        
Number of reportable segments | segment                   3    
Operating revenues                   $ 0 0 0
Operating income (loss)                   7 (96) (19)
Interest expense, net                   (451) (248) (134)
Net utility plant   0       0       0 0 0
Depreciation and amortization expense [1]                   0 0
Income tax expense/(benefit)                     (2,221) (546)
Capital additions                   $ 0 0 0
GSWC                        
Details of reportable segment                        
Number of reportable segments | segment                   2    
Operating revenues   75,226 95,564 84,574 74,244 75,136 99,913 88,346 76,906 $ 329,608 340,301 338,702
Operating income (loss)   14,080 $ 27,540 $ 22,645 $ 16,297 15,780 $ 32,986 $ 35,229 $ 21,876 80,562 105,871 95,187
Net utility plant   1,281,092       1,197,940       1,281,092 1,197,940  
Depreciation and amortization expense                   38,395 37,852 37,804
Income tax expense/(benefit)                   13,603 34,059 28,609
GSWC | Water Service Utility Operations [Member]                        
Details of reportable segment                        
Operating revenues                   295,258 306,332 302,931
Operating income (loss)                   74,342 98,678 87,331
Interest expense, net                   (18,403) (18,909) (19,696)
Net utility plant   1,218,468       1,137,995       1,218,468 1,137,995 1,089,031
Depreciation and amortization expense [1]                   36,137 35,706 35,777
Income tax expense/(benefit)                   12,391 32,212 25,894
Capital additions                   110,934 104,546 120,850
GSWC | Electric Service Utility Operations [Member]                        
Details of reportable segment                        
Operating revenues                   34,350 33,969 35,771
Operating income (loss)                   6,220 7,193 7,856
Interest expense, net                   (1,328) (1,380) (1,337)
Net utility plant   62,624       59,945       62,624 59,945 56,280
Depreciation and amortization expense [1]                   2,258 2,146 2,027
Income tax expense/(benefit)                   1,212 1,847 2,715
Capital additions                   5,420 5,941 7,063
American States Utility Services [Member] | Contracted Services [Member]                        
Details of reportable segment                        
Operating revenues                   107,208 100,302 97,385
Operating income (loss)                   20,414 21,320 19,024
Interest expense, net                   327 (255) (68)
Net utility plant   $ 15,218       $ 7,052       15,218 7,052 5,615
Depreciation and amortization expense [1]                   2,030 1,179 1,046
Income tax expense/(benefit)                   4,939 7,136 6,672
Capital additions                   $ 10,207 $ 2,639 $ 1,954
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases 50 years                 50 years    
[1] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjFhYmU2YTY0ZGY2NTQ2MjdhMjBjODQ2ZTE2YzBkZTVhfFRleHRTZWxlY3Rpb246NUM4NTcwM0FBNTE1NUUwQjlERjBCMDRBQjYwMEU2NTkM}