XML 65 R49.htm IDEA: XBRL DOCUMENT v3.22.0.1
Summary of Significant Accounting Policies (Details)
 6 Months Ended 12 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2021
USD ($)
customer
registrant
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Feb. 02, 2022
USD ($)
Jan. 26, 2022
USD ($)
Jul. 12, 2021
USD ($)
Nature of Operations:              
Number of customers served | customer   1,000,000          
Number of States in which Entity Operates   9          
Number of registrants filing combined report | registrant   2          
Related Party Transactions              
Related Party Transaction, Amounts of Transaction   $ 5,300,000 $ 4,900,000 $ 4,700,000      
Exercise of stock options and other issuance of Common Shares   0 30,000 519,000      
Line of credit facility, current borrowing capacity   200,000,000          
Impairment of Long-Lived Assets              
Asset Retirement Obligation, Legally Restricted Assets, Fair Value   0          
Impairment of long-lived assets   0 0 0      
Goodwill              
Goodwill arose from acquisition of subcontractor's business   $ 1,100,000 1,100,000        
Advances for Construction and Contributions in aid of Constructions              
Period for refund of advances for construction   40 years          
Common Stock [Member]              
Related Party Transactions              
Exercise of stock options and other issuance of Common Shares   $ 0 $ 30,000 $ 519,000      
Stock Issued During Period, Shares, New Issues | shares   47,000 42,000 89,000      
GSWC              
Related Party Transactions              
Exercise of stock options and other issuance of Common Shares   $ 60,000,000 $ 60,000,000        
Regulatory Asset CEMA   $ 1,700,000          
Property and Depreciation              
Aggregate composite rate for depreciation (as a percent)   2.20% 2.20% 2.20%      
Depreciation   $ 35,500,000 $ 32,900,000 $ 31,700,000      
Depreciation on transportation equipment   $ 379,000 353,000 $ 316,000      
Estimated useful lives of utility plant, as authorized by the CPUC              
Generation   40 years          
Fair Value of Financial Instruments              
Long-term debt-GSWC   $ 490,852,000          
Short-term Debt, Terms   24          
Approval amount for the relief funding   $ 9,500,000          
Intercompany payables $ 0 49,280,000 0        
Water Utility Relief Funding For Overdue Water Bills Per Budget Act Of 2021             $ 1,000,000,000
GSWC | Subsequent Event              
Fair Value of Financial Instruments              
Relief funding           $ 9,500,000  
GSWC | Level 1              
Fair Value of Financial Instruments              
Long-term debt-GSWC   0          
GSWC | Level 3              
Fair Value of Financial Instruments              
Long-term debt-GSWC   0          
GSWC | Carrying Amount              
Fair Value of Financial Instruments              
Long-term debt-GSWC 444,271,000 415,788,000 444,271,000        
GSWC | Fair Value              
Fair Value of Financial Instruments              
Long-term debt-GSWC 559,752,000   $ 559,752,000        
GSWC | Fair Value | Level 2              
Fair Value of Financial Instruments              
Long-term debt-GSWC   $ 490,852,000          
GSWC | Minimum              
Estimated useful lives of utility plant, as authorized by the CPUC              
Source of water supply   30 years          
Pumping   25 years          
Water treatment   20 years          
Transmission and Distribution   25 years          
Other plant   7 years          
GSWC | Maximum              
Estimated useful lives of utility plant, as authorized by the CPUC              
Source of water supply   50 years          
Pumping   40 years          
Water treatment   35 years          
Transmission and Distribution   55 years          
Other plant   40 years          
GSWC | Common Stock [Member]              
Related Party Transactions              
Exercise of stock options and other issuance of Common Shares   $ 60,000,000          
Stock Issued During Period, Shares, New Issues | shares   0 5        
Bear Valley Electric Service, Inc.              
Related Party Transactions              
Related Party Transaction, Amounts of Transaction 1,300,000 $ 2,800,000          
Regulatory Asset CEMA   302,000          
Interest              
Public Utilities, Allowance for Funds Used During Construction, Additions   216,000 $ 200,000        
Fair Value of Financial Instruments              
Notes Payable   31,000,000          
Notes Payable   31,000,000          
Bear Valley Electric Service, Inc. | Subsequent Event              
Fair Value of Financial Instruments              
Relief funding         $ 321,000    
Parent              
Related Party Transactions              
Line of credit facility, current borrowing capacity   30,000,000          
Notes receivable, related parties $ 6,000,000 26,000,000 $ 6,000,000        
Notes payable, related parties   $ 0          
Water: | GSWC              
Nature of Operations:              
Number of customers served | customer   262,800          
Electric: | Bear Valley Electric Service, Inc.              
Nature of Operations:              
Number of customers served | customer   24,700          
Contracted services: | American States Utility Services              
Nature of Operations:              
Period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases   50 years