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Segment and Nonregulated Business Reporting (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 subsidiaries | Sep. 30, 2013 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Number of Subsidiaries |  |  |  |  | 4 |  |  |  |
Operating revenue | $ 125,430 |  | $ 85,238 |  | $ 250,382 |  | $ 209,607 |  |
Operating expense | 66,316 |  | 65,892 |  | 173,093 |  | 167,551 |  |
Operating income (loss) | 59,114 |  | 19,346 |  | 77,289 |  | 42,056 |  |
Net income (loss) | 38,366 |  | 8,950 |  | 46,118 |  | 17,707 |  |
Depreciation and amortization | 9,467 |  | 8,787 |  | 28,447 |  | 26,346 |  |
Senior note, mortgage and other interest expense | 5,397 |  | 5,009 |  | 15,221 |  | 14,987 |  |
Income tax expense (benefit) in net income | 15,731 |  | 5,803 |  | 19,384 |  | 11,924 |  |
Assets | 1,210,104 |  | 1,149,840 |  | 1,210,104 |  | 1,149,840 |  | 1,109,986
Water Utility Services | Regulated |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating revenue | 121,921 |  | 81,894 |  | 240,514 |  | 201,149 |  |
Operating expense | 63,518 |  | 63,260 |  | 165,623 |  | 159,845 |  |
Operating income (loss) | 58,403 |  | 18,634 |  | 74,891 |  | 41,304 |  |
Net income (loss) | 37,907 |  | 9,114 |  | 44,401 |  | 18,400 |  |
Depreciation and amortization | 8,984 |  | 8,293 |  | 26,950 |  | 24,879 |  |
Senior note, mortgage and other interest expense | 4,573 |  | 4,197 |  | 12,793 |  | 12,495 |  |
Income tax expense (benefit) in net income | 16,394 |  | 5,840 |  | 19,154 |  | 12,141 |  |
Assets | 1,121,925 |  | 1,053,710 |  | 1,121,925 |  | 1,053,710 |  |
Water Utility Services | Non regulated |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating revenue | 1,739 |  | 1,859 |  | 4,520 |  | 4,524 |  |
Operating expense | 1,508 |  | 1,538 |  | 3,596 |  | 4,573 |  |
Operating income (loss) | 231 |  | 321 |  | 924 |  | (49) |  |
Net income (loss) | 68 |  | 109 |  | 351 |  | (291) |  |
Depreciation and amortization | 89 |  | 90 |  | 269 |  | 270 |  |
Senior note, mortgage and other interest expense | 0 |  | 0 |  | 0 |  | 0 |  |
Income tax expense (benefit) in net income | 73 |  | 135 |  | 314 |  | 48 |  |
Assets | 17,606 |  | 16,443 |  | 17,606 |  | 16,443 |  |
Real Estate Services | Non regulated |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating revenue | 1,770 |  | 1,485 |  | 5,348 |  | 3,934 |  |
Operating expense | 1,041 |  | 820 |  | 3,118 |  | 2,378 |  |
Operating income (loss) | 729 |  | 665 |  | 2,230 |  | 1,556 |  |
Net income (loss) | 795 |  | 132 |  | 1,379 |  | 801 |  |
Depreciation and amortization | 394 |  | 404 |  | 1,228 |  | 1,197 |  |
Senior note, mortgage and other interest expense | 262 |  | 268 |  | 761 |  | 853 |  |
Income tax expense (benefit) in net income | (441) |  | 132 |  | (15) |  | 639 |  |
Assets | 66,457 |  | 71,176 |  | 66,457 |  | 71,176 |  |
All Other | Non regulated |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating revenue | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1] |
Operating expense | 249 | [1] | 274 | [1] | 756 | [1] | 755 | [1] |
Operating income (loss) | (249) | [1] | (274) | [1] | (756) | [1] | (755) | [1] |
Net income (loss) | (404) | [1] | (405) | [1] | (13) | [1] | (1,203) | [1] |
Depreciation and amortization | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1] |
Senior note, mortgage and other interest expense | 562 | [1] | 544 | [1] | 1,667 | [1] | 1,639 | [1] |
Income tax expense (benefit) in net income | (295) | [1] | (304) | [1] | (69) | [1] | (904) | [1] |
Assets | 4,116 | [1] | 8,511 | [1] | 4,116 | [1] | 8,511 | [1] |
SJW Corp. | Regulated |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating revenue | 121,921 |  | 81,894 |  | 240,514 |  | 201,149 |  |
Operating expense | 63,518 |  | 63,260 |  | 165,623 |  | 159,845 |  |
Operating income (loss) | 58,403 |  | 18,634 |  | 74,891 |  | 41,304 |  |
Net income (loss) | 37,907 |  | 9,114 |  | 44,401 |  | 18,400 |  |
Depreciation and amortization | 8,984 |  | 8,293 |  | 26,950 |  | 24,879 |  |
Senior note, mortgage and other interest expense | 4,573 |  | 4,197 |  | 12,793 |  | 12,495 |  |
Income tax expense (benefit) in net income | 16,394 |  | 5,840 |  | 19,154 |  | 12,141 |  |
Assets | 1,121,925 |  | 1,053,710 |  | 1,121,925 |  | 1,053,710 |  |
SJW Corp. | Non regulated |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Operating revenue | 3,509 |  | 3,344 |  | 9,868 |  | 8,458 |  |
Operating expense | 2,798 |  | 2,632 |  | 7,470 |  | 7,706 |  |
Operating income (loss) | 711 |  | 712 |  | 2,398 |  | 752 |  |
Net income (loss) | 459 |  | (164) |  | 1,717 |  | (693) |  |
Depreciation and amortization | 483 |  | 494 |  | 1,497 |  | 1,467 |  |
Senior note, mortgage and other interest expense | 824 |  | 812 |  | 2,428 |  | 2,492 |  |
Income tax expense (benefit) in net income | (663) |  | (37) |  | 230 |  | (217) |  |
Assets | $ 88,179 |  | $ 96,130 |  | $ 88,179 |  | $ 96,130 |  |
[1] | The “All Other” category includes the accounts of SJW Corp. on a stand-alone basis.

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