XML 70 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1
Utility Plant and Intangible Assets 2 (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Intangible assets      
Property, Plant and Equipment, Gross $ 1,674,527 $ 1,620,325  
Total amortized intangible assets 31,192 37,678  
Less - accumulated amortization (23,331) (28,108)  
Intangible assets, net of amortization 7,861 9,570  
Unamortized intangible assets [1] 422 427  
Amortization of intangible assets 1,500 1,900 $ 1,800
Estimated future consolidated amortization expenses related to intangible assets      
2014 1,325    
2015 1,131    
2016 1,003    
2017 949    
2018 949    
Total $ 5,357    
Conservation [Member]      
Intangible assets      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 3 years    
Total amortized intangible assets $ 9,486 9,496  
Water and water service rights      
Intangible assets      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 30 years    
Total amortized intangible assets [2] $ 8,695 8,695  
Water planning studies      
Intangible assets      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 14 years    
Total amortized intangible assets $ 13,011 19,487  
GSWC      
Intangible assets      
Property, Plant and Equipment, Gross 1,658,935 1,608,428  
Total amortized intangible assets 30,621 37,107  
Less - accumulated amortization (23,221) (28,001)  
Intangible assets, net of amortization 7,400 9,106  
Unamortized intangible assets [1] $ 404 409  
GSWC | Conservation [Member]      
Intangible assets      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 3 years    
Total amortized intangible assets $ 9,486 9,496  
GSWC | Water and water service rights      
Intangible assets      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 30 years    
Total amortized intangible assets [2] $ 8,124 8,124  
GSWC | Water planning studies      
Intangible assets      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 14 years    
Total amortized intangible assets $ 13,011 19,487  
Intangible Assets [Member] | American States Utility Services [Member]      
Intangible assets      
Property, Plant and Equipment, Gross $ 571 $ 571  
[1] The intangible assets not subject to amortization primarily consist of organization and consent fees.
[2] Includes intangible assets of $571,000 for contracted services included in "Other Property and Investments" on the consolidated balance sheets as of December 31, 2017 and 2016.