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Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Operating activities: |  |  |  |  |  |
Net income | $ 16,996 | $ (7,640) | $ 14,805 | $ (762) | $ 9,356 | $ 14,043
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Equity earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Dividends received from affiliates |  |  |  |  | 0 | 0
Depreciation and amortization |  |  |  |  | 45,744 | 42,582
Change in value of life insurance contracts |  |  |  |  | (3,147) | 817
Allowance for equity funds used during construction | (1,686) |  | (710) |  | (3,219) | (1,621)
Changes in operating assets and liabilities: |  |  |  |  |  |
Changes in operating assets and liabilities |  |  |  |  | (16,837) | (16,389)
Other changes in noncurrent assets and liabilities |  |  |  |  | 11,494 | 10,139
Net cash provided by operating activities |  |  |  |  | 43,391 | 49,571
Investing activities: |  |  |  |  |  |
Utility plant expenditures |  |  |  |  | (121,936) | (133,900)
Changes in affiliate advances |  |  |  |  | 0 | 0
Issuance of affiliate short-term borrowings |  |  |  |  | 0 | 0
Reduction of affiliates long-term debt |  |  |  |  | 0 | 0
Life insurance proceeds |  |  |  |  | 0 | 2,054
Purchase of life insurance contracts |  |  |  |  | 0 | (2,054)
Net cash used in investing activities |  |  |  |  | (121,936) | (133,900)
Financing Activities: |  |  |  |  |  |
Short-term borrowings |  |  |  |  | 190,000 | 111,000
Repayment of short-term borrowings |  |  |  |  | (90,000) | (61,000)
Proceeds from affiliate short-term borrowings |  |  |  |  | 0 | 0
Changes in affiliate advances |  |  |  |  | 0 | 0
Repayment of affiliates long-term borrowings |  |  |  |  | 0 | 0
Issuance of long-term debt, net of expenses |  |  |  |  | 398,442 | 0
Repayment of long-term debt |  |  |  |  | (401,358) | (12,264)
Advances and contributions in aid of construction |  |  |  |  | 12,755 | 8,385
Refunds of advances for construction |  |  |  |  | (3,555) | (3,498)
Repurchase of common stock |  |  |  |  | (2,203) | (1,364)
Issuance of common stock |  |  |  |  | 829 | 0
Dividends paid to non-affiliates |  |  |  |  | (19,000) | (18,017)
Dividends paid to affiliates |  |  |  |  | 0 | 0
Net cash provided by financing activities |  |  |  |  | 85,910 | 23,242
Change in cash, cash equivalents, and restricted cash |  |  |  |  | 7,365 | (61,087)
Cash, cash equivalents, and restricted cash at beginning of period |  | 47,715 |  | 95,352 | 47,715 | 95,352
Cash, cash equivalents, and restricted cash at end of period | 55,080 |  | 34,265 |  | 55,080 | 34,265
Consolidating Adjustments |  |  |  |  |  |
Operating activities: |  |  |  |  |  |
Net income | (16,909) |  | (14,700) |  | (9,160) | (13,743)
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Equity earnings of subsidiaries | 16,923 |  | 14,717 |  | 9,189 | 13,775
Dividends received from affiliates |  |  |  |  | (19,000) | (18,017)
Depreciation and amortization |  |  |  |  | (41) | (43)
Change in value of life insurance contracts |  |  |  |  | 0 | 0
Allowance for equity funds used during construction | 0 |  | 0 |  | 0 | 0
Changes in operating assets and liabilities: |  |  |  |  |  |
Changes in operating assets and liabilities |  |  |  |  | 0 | 0
Other changes in noncurrent assets and liabilities |  |  |  |  | 12 | 11
Net cash provided by operating activities |  |  |  |  | (19,000) | (18,017)
Investing activities: |  |  |  |  |  |
Utility plant expenditures |  |  |  |  | 0 | 0
Changes in affiliate advances |  |  |  |  | (1,238) | (3,187)
Issuance of affiliate short-term borrowings |  |  |  |  | 4,300 | 3,700
Reduction of affiliates long-term debt |  |  |  |  | (848) | (818)
Life insurance proceeds |  |  |  |  |  | 0
Purchase of life insurance contracts |  |  |  |  |  | 0
Net cash used in investing activities |  |  |  |  | 2,214 | (305)
Financing Activities: |  |  |  |  |  |
Short-term borrowings |  |  |  |  | 0 | 0
Repayment of short-term borrowings |  |  |  |  | 0 | 0
Proceeds from affiliate short-term borrowings |  |  |  |  | (4,300) | (3,700)
Changes in affiliate advances |  |  |  |  | 1,238 | 3,187
Repayment of affiliates long-term borrowings |  |  |  |  | 848 | 818
Issuance of long-term debt, net of expenses |  |  |  |  | 0 |
Repayment of long-term debt |  |  |  |  | 0 | 0
Advances and contributions in aid of construction |  |  |  |  | 0 | 0
Refunds of advances for construction |  |  |  |  | 0 | 0
Repurchase of common stock |  |  |  |  | 0 | 0
Issuance of common stock |  |  |  |  | 0 |
Dividends paid to non-affiliates |  |  |  |  | 0 | 0
Dividends paid to affiliates |  |  |  |  | 19,000 | 18,017
Net cash provided by financing activities |  |  |  |  | 16,786 | 18,322
Change in cash, cash equivalents, and restricted cash |  |  |  |  | 0 | 0
Cash, cash equivalents, and restricted cash at beginning of period |  | 0 |  | 0 | 0 | 0
Cash, cash equivalents, and restricted cash at end of period | 0 |  | 0 |  | 0 | 0
Parent Company | Reportable Legal Entities |  |  |  |  |  |
Operating activities: |  |  |  |  |  |
Net income | 16,996 |  | 14,805 |  | 9,356 | 14,043
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Equity earnings of subsidiaries | (16,923) |  | (14,717) |  | (9,189) | (13,775)
Dividends received from affiliates |  |  |  |  | 19,000 | 18,017
Depreciation and amortization |  |  |  |  | 47 | 47
Change in value of life insurance contracts |  |  |  |  | 0 | 0
Allowance for equity funds used during construction | 0 |  | 0 |  | 0 | 0
Changes in operating assets and liabilities: |  |  |  |  |  |
Changes in operating assets and liabilities |  |  |  |  | 63 | (417)
Other changes in noncurrent assets and liabilities |  |  |  |  | 3,763 | 1,610
Net cash provided by operating activities |  |  |  |  | 23,040 | 19,525
Investing activities: |  |  |  |  |  |
Utility plant expenditures |  |  |  |  | 0 | 0
Changes in affiliate advances |  |  |  |  | (1,453) | 58
Issuance of affiliate short-term borrowings |  |  |  |  | (4,300) | (3,700)
Reduction of affiliates long-term debt |  |  |  |  | 848 | 818
Life insurance proceeds |  |  |  |  |  | 0
Purchase of life insurance contracts |  |  |  |  |  | 0
Net cash used in investing activities |  |  |  |  | (4,905) | (2,824)
Financing Activities: |  |  |  |  |  |
Short-term borrowings |  |  |  |  | 0 | 0
Repayment of short-term borrowings |  |  |  |  | 0 | 0
Proceeds from affiliate short-term borrowings |  |  |  |  | 0 | 0
Changes in affiliate advances |  |  |  |  | (17) | 0
Repayment of affiliates long-term borrowings |  |  |  |  | 0 | 0
Issuance of long-term debt, net of expenses |  |  |  |  | 0 |
Repayment of long-term debt |  |  |  |  | 0 | 0
Advances and contributions in aid of construction |  |  |  |  | 0 | 0
Refunds of advances for construction |  |  |  |  | 0 | 0
Repurchase of common stock |  |  |  |  | (2,203) | (1,364)
Issuance of common stock |  |  |  |  | 829 |
Dividends paid to non-affiliates |  |  |  |  | (19,000) | (18,017)
Dividends paid to affiliates |  |  |  |  | 0 | 0
Net cash provided by financing activities |  |  |  |  | (20,391) | (19,381)
Change in cash, cash equivalents, and restricted cash |  |  |  |  | (2,256) | (2,680)
Cash, cash equivalents, and restricted cash at beginning of period |  | 3,779 |  | 4,728 | 3,779 | 4,728
Cash, cash equivalents, and restricted cash at end of period | 1,523 |  | 2,048 |  | 1,523 | 2,048
Cal Water | Reportable Legal Entities |  |  |  |  |  |
Operating activities: |  |  |  |  |  |
Net income | 15,315 |  | 13,679 |  | 7,374 | 12,742
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Equity earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Dividends received from affiliates |  |  |  |  | 0 | 0
Depreciation and amortization |  |  |  |  | 42,717 | 40,146
Change in value of life insurance contracts |  |  |  |  | (3,147) | 817
Allowance for equity funds used during construction | (1,686) |  | (710) |  | (3,219) | (1,621)
Changes in operating assets and liabilities: |  |  |  |  |  |
Changes in operating assets and liabilities |  |  |  |  | (16,581) | (16,439)
Other changes in noncurrent assets and liabilities |  |  |  |  | 6,289 | 8,087
Net cash provided by operating activities |  |  |  |  | 33,433 | 43,732
Investing activities: |  |  |  |  |  |
Utility plant expenditures |  |  |  |  | (116,384) | (128,683)
Changes in affiliate advances |  |  |  |  | 2,856 | 3,323
Issuance of affiliate short-term borrowings |  |  |  |  | 0 | 0
Reduction of affiliates long-term debt |  |  |  |  | 0 | 0
Life insurance proceeds |  |  |  |  |  | 2,054
Purchase of life insurance contracts |  |  |  |  |  | (2,054)
Net cash used in investing activities |  |  |  |  | (113,528) | (125,360)
Financing Activities: |  |  |  |  |  |
Short-term borrowings |  |  |  |  | 190,000 | 111,000
Repayment of short-term borrowings |  |  |  |  | (90,000) | (61,000)
Proceeds from affiliate short-term borrowings |  |  |  |  | 0 | 0
Changes in affiliate advances |  |  |  |  | 2,430 | 129
Repayment of affiliates long-term borrowings |  |  |  |  | 0 | 0
Issuance of long-term debt, net of expenses |  |  |  |  | 398,442 |
Repayment of long-term debt |  |  |  |  | (401,256) | (12,136)
Advances and contributions in aid of construction |  |  |  |  | 12,679 | 8,029
Refunds of advances for construction |  |  |  |  | (3,554) | (3,489)
Repurchase of common stock |  |  |  |  | 0 | 0
Issuance of common stock |  |  |  |  | 0 |
Dividends paid to non-affiliates |  |  |  |  | 0 | 0
Dividends paid to affiliates |  |  |  |  | (18,348) | (17,330)
Net cash provided by financing activities |  |  |  |  | 90,393 | 25,203
Change in cash, cash equivalents, and restricted cash |  |  |  |  | 10,298 | (56,425)
Cash, cash equivalents, and restricted cash at beginning of period |  | 34,238 |  | 81,453 | 34,238 | 81,453
Cash, cash equivalents, and restricted cash at end of period | 44,536 |  | 25,028 |  | 44,536 | 25,028
All Other Subsidiaries | Reportable Legal Entities |  |  |  |  |  |
Operating activities: |  |  |  |  |  |
Net income | 1,594 |  | 1,021 |  | 1,786 | 1,001
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Equity earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Dividends received from affiliates |  |  |  |  | 0 | 0
Depreciation and amortization |  |  |  |  | 3,021 | 2,432
Change in value of life insurance contracts |  |  |  |  | 0 | 0
Allowance for equity funds used during construction | 0 |  | 0 |  | 0 | 0
Changes in operating assets and liabilities: |  |  |  |  |  |
Changes in operating assets and liabilities |  |  |  |  | (319) | 467
Other changes in noncurrent assets and liabilities |  |  |  |  | 1,430 | 431
Net cash provided by operating activities |  |  |  |  | 5,918 | 4,331
Investing activities: |  |  |  |  |  |
Utility plant expenditures |  |  |  |  | (5,552) | (5,217)
Changes in affiliate advances |  |  |  |  | (165) | (194)
Issuance of affiliate short-term borrowings |  |  |  |  | 0 | 0
Reduction of affiliates long-term debt |  |  |  |  | 0 | 0
Life insurance proceeds |  |  |  |  |  | 0
Purchase of life insurance contracts |  |  |  |  |  | 0
Net cash used in investing activities |  |  |  |  | (5,717) | (5,411)
Financing Activities: |  |  |  |  |  |
Short-term borrowings |  |  |  |  | 0 | 0
Repayment of short-term borrowings |  |  |  |  | 0 | 0
Proceeds from affiliate short-term borrowings |  |  |  |  | 4,300 | 3,700
Changes in affiliate advances |  |  |  |  | (3,651) | (3,316)
Repayment of affiliates long-term borrowings |  |  |  |  | (848) | (818)
Issuance of long-term debt, net of expenses |  |  |  |  | 0 |
Repayment of long-term debt |  |  |  |  | (102) | (128)
Advances and contributions in aid of construction |  |  |  |  | 76 | 356
Refunds of advances for construction |  |  |  |  | (1) | (9)
Repurchase of common stock |  |  |  |  | 0 | 0
Issuance of common stock |  |  |  |  | 0 |
Dividends paid to non-affiliates |  |  |  |  | 0 | 0
Dividends paid to affiliates |  |  |  |  | (652) | (687)
Net cash provided by financing activities |  |  |  |  | (878) | (902)
Change in cash, cash equivalents, and restricted cash |  |  |  |  | (677) | (1,982)
Cash, cash equivalents, and restricted cash at beginning of period |  | $ 9,698 |  | $ 9,171 | 9,698 | 9,171
Cash, cash equivalents, and restricted cash at end of period | $ 9,021 |  | $ 7,189 |  | $ 9,021 | $ 7,189

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