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LONG-TERM DEBT (Details) - USD ($) | Jun. 11, 2019 | Oct. 04, 2011 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Long-term debt |  |  |  |
Unamortized debt issuance costs |  |  | $ (4,490,000) | $ (4,693,000)
Total long-term debt |  |  | 786,227,000 | 808,622,000
Current maturities of long-term debt, net |  |  | 5,127,000 | 21,868,000
Long-term debt, net |  |  | 781,100,000 | 786,754,000
Capital lease liability |  |  | 5,204,000 | 5,885,000
Cal Water |  |  |  |
Long-term debt |  |  |  |
Debt maturity period |  | 15 years |  |
Capital lease liability |  |  | 4,600,000 |
Capital lease liability |  |  |  | 5,200,000
Mortgages | Cal Water |  |  |  |
Long-term debt |  |  |  |
Debt issued | $ 400,000,000.0 |  |  |
Mortgages | Series UUU | Cal Water |  |  |  |
Long-term debt |  |  |  |
Repayment of debt | $ 300,000,000.0 |  |  |
Mortgages | Series VVV | Cal Water |  |  |  |
Long-term debt |  |  |  |
Interest rate | 3.40% |  |  |
Debt issued | $ 100,000,000.0 |  |  |
Mortgages | Series WWW | Cal Water |  |  |  |
Long-term debt |  |  |  |
Interest rate | 4.07% |  |  |
Debt issued | $ 100,000,000.0 |  |  |
Mortgages | Series YYY | Cal Water |  |  |  |
Long-term debt |  |  |  |
Interest rate | 4.17% |  |  |
Debt issued | $ 200,000,000.0 |  |  |
First Mortgage |  |  |  |
Long-term debt |  |  |  |
Long-term debt |  |  | $ 780,000,000 | 801,246,000
First Mortgage Bonds YYY Series Due 2059 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 4.17% |
Long-term debt |  |  | $ 200,000,000 | 200,000,000
First Mortgage Bonds WWW Series Due 2049 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 4.07% |
Long-term debt |  |  | $ 100,000,000 | 100,000,000
First Mortgage Bonds VVV Series Due 2029 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 3.40% |
Long-term debt |  |  | $ 100,000,000 | 100,000,000
First Mortgage Bonds TTT Series Due 2056 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 4.61% |
Long-term debt |  |  | $ 10,000,000 | 10,000,000
First Mortgage Bonds SSS Series Due 2046 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 4.41% |
Long-term debt |  |  | $ 40,000,000 | 40,000,000
First Mortgage Bonds QQQ Series Due 2025 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 3.33% |
Long-term debt |  |  | $ 50,000,000 | 50,000,000
First Mortgage Bonds RRR Series Due 2045 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 4.31% |
Long-term debt |  |  | $ 50,000,000 | 50,000,000
First Mortgage Bonds PPP Series, due 2040 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 5.50% |
Long-term debt |  |  | $ 100,000,000 | 100,000,000
First Mortgage Bonds AAA Series, due in 2025 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 7.28% |
Long-term debt |  |  | $ 20,000,000 | 20,000,000
First Mortgage Bonds BBB Series, due in 2028 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 6.77% |
Long-term debt |  |  | $ 20,000,000 | 20,000,000
First Mortgage Bonds CCC Series, Due 2030 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 8.15% |
Long-term debt |  |  | $ 20,000,000 | 20,000,000
First Mortgage Bonds DDD Series, Due 2031 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 7.13% |
Long-term debt |  |  | $ 20,000,000 | 20,000,000
First Mortgage Bonds EEE Series, Due 2032 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 7.11% |
Long-term debt |  |  | $ 20,000,000 | 20,000,000
First Mortgage Bonds GGG Series, Due 2022 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 5.29% |
Long-term debt |  |  | $ 3,636,000 | 5,455,000
First Mortgage Bonds HHH Series, Due 2022 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 5.29% |
Long-term debt |  |  | $ 3,636,000 | 5,455,000
First Mortgage Bonds III Series, Due 2023 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 5.54% |
Long-term debt |  |  | $ 2,728,000 | 3,636,000
First Mortgage Bonds OOO Series, Due 2031 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 6.02% |
Long-term debt |  |  | $ 20,000,000 | 20,000,000
First Mortgage Bonds CC Series, Due 2020 |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 9.86% |
Long-term debt |  |  | $ 0 | 16,700,000
California Department of Water Resources Loans |  |  |  |
Long-term debt |  |  |  |
Long-term debt |  |  | $ 5,148,000 | 5,604,000
California Department of Water Resources Loans | Minimum |  |  |  |
Long-term debt |  |  |  |
Interest rate |  |  | 3.00% |
Other Long-term Debt |  |  |  |
Long-term debt |  |  |  |
Long-term debt |  |  | $ 5,569,000 | $ 6,465,000

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121616839&loc=d3e45280-112737 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121569800&loc=d3e45023-112735 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
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