Regulatory Rate Filings	3 Months Ended
Mar. 31, 2017
Regulated Operations [Abstract]
Regulatory Rate Filings	Regulatory Rate Filings On November 15, 2016, San Jose Water Company filed Advice Letter No. 498 with the CPUC requesting a revenue increase of $13,205, or 3.8%, for the 2017 escalation year. This request was approved and the new rates became effective on January 1, 2017. On January 6, 2017, San Jose Water Company filed Advice Letter No. 501 with the CPUC requesting authorization to implement a sales reconciliation mechanism to better conform with water forecasts authorized in the last general rate case to recorded consumption for the period of October 2015 through September 2016. The CPUC has ordered all Class A and B water utilities that have a five percent or greater divergence between authorized and actual sales during declared drought years to request a sales reconciliation mechanism to better conform with water forecasts authorized in the last general rate case to recorded consumption. The Company expects to receive a decision on the filing in the second quarter of 2017. San Jose Water Company filed Advice Letter No. 505 on January 27, 2017 with the CPUC to suspend its allocation program and all drought surcharges previously authorized in Schedule 14.1, Water Shortage Contingency Plan with Staged Mandatory Reductions and Drought Surcharges. The allocations and drought surcharges were suspended effective February 1, 2017. However, Schedule 14.1, and all of the water use restrictions defined therein, will remain in effect in light of the call for continued conservation by the SCVWD. The allocations and drought surcharges were suspended effective February 1, 2017. On February 17, 2017, San Jose Water Company filed Advice Letter No. 506 with the CPUC requesting authorization to increase its revenue requirement by $5,339 or 1.5% via a rate base offset for calendar year 2016 plant additions related to the Montevina Water Treatment Plant upgrade project. This request was approved and the new rates became effective on March 20, 2017. As required by the CPUC, on April 3, 2017 San Jose Water Company filed an application with the CPUC requesting authority to increase its authorized Cost of Capital for the period from January 1, 2018 through December 31, 2020. If approved by the CPUC, San Jose Water Company’s annual revenues would increase by approximately $7,550 or about 2.1% in 2018. In compliance with the most recent order in Public Utilities Commission of Texas (“PUCT”) Docket No. 42858 effective January 1, 2017, CLWSC was authorized a rate increase of 2.3%. Subsequently, the annual adjustment of the water cost pass-through gallonage charge resulted in a decrease in the gallonage charge from $1.34 to $1.15 effective on February 1, 2017.

Regulatory Rate Filings

On November 15, 2016, San Jose Water Company filed Advice Letter No. 498 with the CPUC requesting a revenue increase of $13,205, or 3.8%, for the 2017 escalation year. This request was approved and the new rates became effective on January 1, 2017.

On January 6, 2017, San Jose Water Company filed Advice Letter No. 501 with the CPUC requesting authorization to implement a sales reconciliation mechanism to better conform with water forecasts authorized in the last general rate case to recorded consumption for the period of October 2015 through September 2016. The CPUC has ordered all Class A and B water utilities that have a five percent or greater divergence between authorized and actual sales during declared drought years to request a sales reconciliation mechanism to better conform with water forecasts authorized in the last general rate case to recorded consumption. The Company expects to receive a decision on the filing in the second quarter of 2017.

San Jose Water Company filed Advice Letter No. 505 on January 27, 2017 with the CPUC to suspend its allocation program and all drought surcharges previously authorized in Schedule 14.1, Water Shortage Contingency Plan with Staged Mandatory Reductions and Drought Surcharges. The allocations and drought surcharges were suspended effective February 1, 2017. However, Schedule 14.1, and all of the water use restrictions defined therein, will remain in effect in light of the call for continued conservation by the SCVWD. The allocations and drought surcharges were suspended effective February 1, 2017.

On February 17, 2017, San Jose Water Company filed Advice Letter No. 506 with the CPUC requesting authorization to increase its revenue requirement by $5,339 or 1.5% via a rate base offset for calendar year 2016 plant additions related to the Montevina Water Treatment Plant upgrade project. This request was approved and the new rates became effective on March 20, 2017.

As required by the CPUC, on April 3, 2017 San Jose Water Company filed an application with the CPUC requesting authority to increase its authorized Cost of Capital for the period from January 1, 2018 through December 31, 2020. If approved by the CPUC, San Jose Water Company’s annual revenues would increase by approximately $7,550 or about 2.1% in 2018.

In compliance with the most recent order in Public Utilities Commission of Texas (“PUCT”) Docket No. 42858 effective January 1, 2017, CLWSC was authorized a rate increase of 2.3%. Subsequently, the annual adjustment of the water cost pass-through gallonage charge resulted in a decrease in the gallonage charge from $1.34 to $1.15 effective on February 1, 2017.