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Equity Plans (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

A summary of compensation costs charged to income, proceeds from the exercise of stock options and similar instruments and the tax benefit realized from stock options and similar instruments exercised, that are recorded to additional paid-in capital and common stock, by award type, are presented below for the years ended December 31:

	2016				2015			2014
Compensation costs charged to income:
ESPP	$	168			158			148
Restricted stock and deferred restricted stock	1,523				1,445			883
Total compensation costs charged to income	$	1,691			1,603			1,031
Proceeds from the exercise of stock options and similar instruments:
Stock options	$	—			—			1,044
ESPP	954				895			839
DRSPP	—				—			34
Total proceeds from the exercise of stock options and similar instruments	$	954			895			1,917
Excess tax benefits realized from share options exercised and stock issuance:
Stock options	$	—			—			213
Restricted stock and deferred restricted stock	203				634			249
Total excess tax benefits realized from share options exercised and stock issuance	$	203			634			462

Schedule of Share-based Compensation, Stock Options, Activity

As of December 31, 2016 and 2015, there were no outstanding options and no option award activity during the years ended December 31, 2016 and 2015.

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of SJW Group’s restricted and deferred restricted stock awards as of December 31, 2016, and changes during the year ended December 31, 2016, are presented below:

	Units			Weighted- Average Grant- Date Fair Value
Outstanding as of January 1, 2016	209,237			$	21.49
Issued	40,398			$	29.83
Vested	(55,919	)		$	26.92
Forfeited or expired	(996	)		$	27.86
Outstanding as of December 31, 2016	192,720			$	21.69
Shares vested as of December 31, 2016	106,817			$	16.62

Schedule of Nonvested Restricted Stock Units Activity

A summary of the status of SJW Group’s nonvested restricted and deferred restricted stock awards as of December 31, 2016, and changes during the year ended December 31, 2016, are presented below:

	Units			Weighted-  Average Grant- Date Fair Value
Nonvested as of January 1, 2016	93,544			$	27.63
Granted	40,398			$	29.65
Vested	(47,043	)		$	28.71
Forfeited	(996	)		$	27.86
Nonvested as of December 31, 2016	85,903			$	28.00

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Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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