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Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Income (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
Condensed Consolidating Financial Statements |  |  |  |  |  |
Operating revenue | $ 179,031 |  | $ 174,938 |  | $ 305,142 | $ 309,491
Operations: |  |  |  |  |  |
Water production costs | 64,635 |  | 65,373 |  | 110,227 | 112,979
Administrative and general | 25,434 |  | 24,383 |  | 54,531 | 50,702
Other operations | 22,542 |  | 20,724 |  | 40,363 | 38,364
Maintenance | 5,692 |  | 5,389 |  | 12,147 | 10,828
Depreciation and amortization | 22,326 |  | 20,953 |  | 44,694 | 41,668
Income tax (benefit) expense | 4,321 |  | 4,870 |  | 1,330 | 5,164
Property and other taxes | 7,068 |  | 6,407 |  | 14,361 | 13,111
Total operating (income) expenses | 152,018 |  | 148,099 |  | 277,653 | 272,816
Net operating income | 27,013 |  | 26,839 |  | 27,489 | 36,675
Other income and expenses: |  |  |  |  |  |
Non-regulated revenue | 5,130 |  | 4,845 |  | 10,031 | 9,264
Non-regulated expenses | (3,900) |  | (6,115) |  | (6,119) | (11,552)
Other components of net periodic benefit cost | (1,192) |  | (2,463) |  | (2,451) | (5,009)
Allowance for equity funds used during construction | 1,686 |  | 710 |  | 3,219 | 1,621
Income tax (expense) benefit on other income and expenses | (487) |  | 819 |  | (1,315) | 1,577
Net other income (loss) | 1,237 |  | (2,204) |  | 3,365 | (4,099)
Interest expense: |  |  |  |  |  |
Interest expense | 12,178 |  | 10,134 |  | 23,253 | 19,332
Allowance for borrowed funds used during construction | (924) |  | (304) |  | (1,755) | (799)
Net interest expense | 11,254 |  | 9,830 |  | 21,498 | 18,533
Equity earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Net income (loss) | 16,996 | $ (7,640) | 14,805 | $ (762) | 9,356 | 14,043
Consolidating Adjustments |  |  |  |  |  |
Condensed Consolidating Financial Statements |  |  |  |  |  |
Operating revenue | 0 |  | 0 |  | 0 | 0
Operations: |  |  |  |  |  |
Water production costs | 0 |  | 0 |  | 0 | 0
Administrative and general | 0 |  | 0 |  | 0 | 0
Other operations | (144) |  | (146) |  | (290) | (292)
Maintenance | 0 |  | 0 |  | 0 | 0
Depreciation and amortization | (20) |  | (21) |  | (41) | (43)
Income tax (benefit) expense | 218 |  | 201 |  | 436 | 398
Property and other taxes | 0 |  | 0 |  | 0 | 0
Total operating (income) expenses | 54 |  | 34 |  | 105 | 63
Net operating income | (54) |  | (34) |  | (105) | (63)
Other income and expenses: |  |  |  |  |  |
Non-regulated revenue | (759) |  | (703) |  | (1,518) | (1,379)
Non-regulated expenses | 0 |  | 0 |  | 0 | 0
Other components of net periodic benefit cost | 0 |  | 0 |  | 0 | 0
Allowance for equity funds used during construction | 0 |  | 0 |  | 0 | 0
Income tax (expense) benefit on other income and expenses | 213 |  | 197 |  | 425 | 386
Net other income (loss) | (546) |  | (506) |  | (1,093) | (993)
Interest expense: |  |  |  |  |  |
Interest expense | (614) |  | (557) |  | (1,227) | (1,088)
Allowance for borrowed funds used during construction | 0 |  | 0 |  | 0 | 0
Net interest expense | (614) |  | (557) |  | (1,227) | (1,088)
Equity earnings of subsidiaries | (16,923) |  | (14,717) |  | (9,189) | (13,775)
Net income (loss) | (16,909) |  | (14,700) |  | (9,160) | (13,743)
Parent Company | Reportable Legal Entities |  |  |  |  |  |
Condensed Consolidating Financial Statements |  |  |  |  |  |
Operating revenue | 0 |  | 0 |  | 0 | 0
Operations: |  |  |  |  |  |
Water production costs | 0 |  | 0 |  | 0 | 0
Administrative and general | 23 |  | 0 |  | 23 | 0
Other operations | 0 |  | 0 |  | 0 | 0
Maintenance | 0 |  | 0 |  | 0 | 0
Depreciation and amortization | 24 |  | 24 |  | 47 | 47
Income tax (benefit) expense | (144) |  | (122) |  | (279) | (200)
Property and other taxes | 0 |  | 0 |  | 0 | 0
Total operating (income) expenses | (97) |  | (98) |  | (209) | (153)
Net operating income | 97 |  | 98 |  | 209 | 153
Other income and expenses: |  |  |  |  |  |
Non-regulated revenue | 614 |  | 557 |  | 1,227 | 1,088
Non-regulated expenses | 0 |  | 0 |  | 0 | 0
Other components of net periodic benefit cost | 0 |  | 0 |  | 0 | 0
Allowance for equity funds used during construction | 0 |  | 0 |  | 0 | 0
Income tax (expense) benefit on other income and expenses | (171) |  | (156) |  | (343) | (304)
Net other income (loss) | 443 |  | 401 |  | 884 | 784
Interest expense: |  |  |  |  |  |
Interest expense | 467 |  | 411 |  | 926 | 669
Allowance for borrowed funds used during construction | 0 |  | 0 |  | 0 | 0
Net interest expense | 467 |  | 411 |  | 926 | 669
Equity earnings of subsidiaries | 16,923 |  | 14,717 |  | 9,189 | 13,775
Net income (loss) | 16,996 |  | 14,805 |  | 9,356 | 14,043
Cal Water | Reportable Legal Entities |  |  |  |  |  |
Condensed Consolidating Financial Statements |  |  |  |  |  |
Operating revenue | 167,450 |  | 164,602 |  | 283,524 | 290,478
Operations: |  |  |  |  |  |
Water production costs | 62,143 |  | 63,209 |  | 105,569 | 108,832
Administrative and general | 23,207 |  | 22,047 |  | 49,410 | 45,653
Other operations | 20,857 |  | 19,138 |  | 36,979 | 35,355
Maintenance | 5,423 |  | 5,192 |  | 11,646 | 10,436
Depreciation and amortization | 20,814 |  | 19,664 |  | 41,701 | 39,277
Income tax (benefit) expense | 3,792 |  | 4,463 |  | 687 | 4,646
Property and other taxes | 6,305 |  | 5,682 |  | 12,811 | 11,689
Total operating (income) expenses | 142,541 |  | 139,395 |  | 258,803 | 255,888
Net operating income | 24,909 |  | 25,207 |  | 24,721 | 34,590
Other income and expenses: |  |  |  |  |  |
Non-regulated revenue | 4,881 |  | 4,739 |  | 9,509 | 8,983
Non-regulated expenses | (3,665) |  | (5,975) |  | (5,703) | (11,268)
Other components of net periodic benefit cost | (1,164) |  | (2,337) |  | (2,393) | (4,784)
Allowance for equity funds used during construction | 1,686 |  | 710 |  | 3,219 | 1,621
Income tax (expense) benefit on other income and expenses | (486) |  | 783 |  | (1,296) | 1,524
Net other income (loss) | 1,252 |  | (2,080) |  | 3,336 | (3,924)
Interest expense: |  |  |  |  |  |
Interest expense | 11,708 |  | 9,718 |  | 22,321 | 18,652
Allowance for borrowed funds used during construction | (862) |  | (270) |  | (1,638) | (728)
Net interest expense | 10,846 |  | 9,448 |  | 20,683 | 17,924
Equity earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Net income (loss) | 15,315 |  | 13,679 |  | 7,374 | 12,742
All Other Subsidiaries | Reportable Legal Entities |  |  |  |  |  |
Condensed Consolidating Financial Statements |  |  |  |  |  |
Operating revenue | 11,581 |  | 10,336 |  | 21,618 | 19,013
Operations: |  |  |  |  |  |
Water production costs | 2,492 |  | 2,164 |  | 4,658 | 4,147
Administrative and general | 2,204 |  | 2,336 |  | 5,098 | 5,049
Other operations | 1,829 |  | 1,732 |  | 3,674 | 3,301
Maintenance | 269 |  | 197 |  | 501 | 392
Depreciation and amortization | 1,508 |  | 1,286 |  | 2,987 | 2,387
Income tax (benefit) expense | 455 |  | 328 |  | 486 | 320
Property and other taxes | 763 |  | 725 |  | 1,550 | 1,422
Total operating (income) expenses | 9,520 |  | 8,768 |  | 18,954 | 17,018
Net operating income | 2,061 |  | 1,568 |  | 2,664 | 1,995
Other income and expenses: |  |  |  |  |  |
Non-regulated revenue | 394 |  | 252 |  | 813 | 572
Non-regulated expenses | (235) |  | (140) |  | (416) | (284)
Other components of net periodic benefit cost | (28) |  | (126) |  | (58) | (225)
Allowance for equity funds used during construction | 0 |  | 0 |  | 0 | 0
Income tax (expense) benefit on other income and expenses | (43) |  | (5) |  | (101) | (29)
Net other income (loss) | 88 |  | (19) |  | 238 | 34
Interest expense: |  |  |  |  |  |
Interest expense | 617 |  | 562 |  | 1,233 | 1,099
Allowance for borrowed funds used during construction | (62) |  | (34) |  | (117) | (71)
Net interest expense | 555 |  | 528 |  | 1,116 | 1,028
Equity earnings of subsidiaries | 0 |  | 0 |  | 0 | 0
Net income (loss) | $ 1,594 |  | $ 1,021 |  | $ 1,786 | $ 1,001

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