Commitments (Tables)

12 Months Ended

Dec. 31, 2017

Risks and Uncertainties [Abstract]

Schedule of estimated future minimum payments under purchased water supply commitments

GSWC’s estimated future minimum payments under these purchased water supply commitments at December 31, 2017 are as follows (in thousands):

2018	$	400
2019	400
2020	401
2021	400
2022	401
Thereafter	2,792
Total	$	4,794

Schedule of future minimum payments under long-term non-cancelable operating leases

Registrant’s future minimum payments under long-term non-cancelable operating leases at December 31, 2017 are as follows (in thousands):

2018	$	2,250
2019	1,934
2020	1,717
2021	819
2022	892
Thereafter	339
Total	$	7,951